1211201222022 has 192 divisors, whose sum is σ = 3112663357440. Its totient is φ = 336287116800.

The previous prime is 1211201221999. The next prime is 1211201222027. The reversal of 1211201222022 is 2202221021121.

It is a happy number.

It is a super-2 number, since 2×1211201222022² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1211201221986 and 1211201222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201222027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 344383008 + ... + 344386524.

It is an arithmetic number, because the mean of its divisors is an integer number (16211788320).

Almost surely, 2^{1211201222022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211201222022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1556331678720).

1211201222022 is an abundant number, since it is smaller than the sum of its proper divisors (1901462135418).

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

1211201222022 is a wasteful number, since it uses less digits than its factorization.

1211201222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6539 (or 6536 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1211201222022 its reverse (2202221021121), we get a palindrome (3413422243143).

The spelling of 1211201222022 in words is "one trillion, two hundred eleven billion, two hundred one million, two hundred twenty-two thousand, twenty-two".