121331442012 has 48 divisors (see below), whose sum is σ = 319493462400. Its totient is φ = 35499271360.

The previous prime is 121331441989. The next prime is 121331442019. The reversal of 121331442012 is 210244133121.

It is a super-2 number, since 2×121331442012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331442019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15844062 + ... + 15851717.

It is an arithmetic number, because the mean of its divisors is an integer number (6656113800).

Almost surely, 2^121331442012 is an apocalyptic number.

121331442012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121331442012 is an abundant number, since it is smaller than the sum of its proper divisors (198162020388).

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

121331442012 is a wasteful number, since it uses less digits than its factorization.

121331442012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31695826 (or 31695824 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 121331442012 its reverse (210244133121), we get a palindrome (331575575133).

The spelling of 121331442012 in words is "one hundred twenty-one billion, three hundred thirty-one million, four hundred forty-two thousand, twelve".