121121010012 has 24 divisors (see below), whose sum is σ = 282782080000. Its totient is φ = 40349900016.

The previous prime is 121121009983. The next prime is 121121010029. The reversal of 121121010012 is 210010121121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121121010012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2950012 + ... + 2990787.

Almost surely, 2^121121010012 is an apocalyptic number.

121121010012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121121010012 is an abundant number, since it is smaller than the sum of its proper divisors (161661069988).

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

121121010012 is a wasteful number, since it uses less digits than its factorization.

121121010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5942505 (or 5942503 counting only the distinct ones).

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

Adding to 121121010012 its reverse (210010121121), we get a palindrome (331131131133).

The spelling of 121121010012 in words is "one hundred twenty-one billion, one hundred twenty-one million, ten thousand, twelve".