1211322001120 has 384 divisors, whose sum is σ = 3787453458432. Its totient is φ = 354435072000.

The previous prime is 1211322001081. The next prime is 1211322001121. The reversal of 1211322001120 is 211002231121.

It is a super-2 number, since 2×1211322001120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1211322001094 and 1211322001103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211322001121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83978229 + ... + 83992651.

It is an arithmetic number, because the mean of its divisors is an integer number (9863160048).

Almost surely, 2^{1211322001120} is an apocalyptic number.

1211322001120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211322001120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893726729216).

1211322001120 is an abundant number, since it is smaller than the sum of its proper divisors (2576131457312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211322001120 is a wasteful number, since it uses less digits than its factorization.

1211322001120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14874 (or 14866 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1211322001120 its reverse (211002231121), we get a palindrome (1422324232241).

The spelling of 1211322001120 in words is "one trillion, two hundred eleven billion, three hundred twenty-two million, one thousand, one hundred twenty".