1201011021120 has 56 divisors (see below), whose sum is σ = 3813209995104. Its totient is φ = 320269605376.

The previous prime is 1201011021103. The next prime is 1201011021127. The reversal of 1201011021120 is 211201101021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1201011021096 and 1201011021105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201011021127) 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 7 ways as a sum of consecutive naturals, for example, 625525614 + ... + 625527533.

Almost surely, 2^{1201011021120} is an apocalyptic number.

1201011021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201011021120 is an abundant number, since it is smaller than the sum of its proper divisors (2612198973984).

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

1201011021120 is a wasteful number, since it uses less digits than its factorization.

1201011021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251053167 (or 1251053157 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201011021120 its reverse (211201101021), we get a palindrome (1412212122141).

The spelling of 1201011021120 in words is "one trillion, two hundred one billion, eleven million, twenty-one thousand, one hundred twenty".