121321233012 has 48 divisors (see below), whose sum is σ = 323834900480. Its totient is φ = 34629822432.

The previous prime is 121321233001. The next prime is 121321233029. The reversal of 121321233012 is 210332123121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 121321233012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607768 + ... + 782319.

Almost surely, 2^121321233012 is an apocalyptic number.

121321233012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121321233012 is an abundant number, since it is smaller than the sum of its proper divisors (202513667468).

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

121321233012 is a wasteful number, since it uses less digits than its factorization.

121321233012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391140 (or 1391138 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121321233012 its reverse (210332123121), we get a palindrome (331653356133).

The spelling of 121321233012 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred thirty-three thousand, twelve".