121010111112 has 64 divisors (see below), whose sum is σ = 333295248960. Its totient is φ = 36306656000.

The previous prime is 121010111083. The next prime is 121010111141. The reversal of 121010111112 is 211111010121.

It is an interprime number because it is at equal distance from previous prime (121010111083) and next prime (121010111141).

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

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, 2242503 + ... + 2295830.

It is an arithmetic number, because the mean of its divisors is an integer number (5207738265).

Almost surely, 2^121010111112 is an apocalyptic number.

121010111112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121010111112 is an abundant number, since it is smaller than the sum of its proper divisors (212285137848).

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

121010111112 is a wasteful number, since it uses less digits than its factorization.

121010111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538454 (or 4538450 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121010111112 its reverse (211111010121), we get a palindrome (332121121233).

The spelling of 121010111112 in words is "one hundred twenty-one billion, ten million, one hundred eleven thousand, one hundred twelve".