121212000112100 has 72 divisors (see below), whose sum is σ = 267624397270440. Its totient is φ = 47642852090880.

The previous prime is 121212000112069. The next prime is 121212000112103. The reversal of 121212000112100 is 1211000212121.

It can be written as a sum of positive squares in 12 ways, for example, as 79200317095936 + 42011683016164 = 8899456^2 + 6481642^2 .

It is not an unprimeable number, because it can be changed into a prime (121212000112103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28899467 + ... + 32826866.

It is an arithmetic number, because the mean of its divisors is an integer number (3717005517645).

Almost surely, 2^{121212000112100} is an apocalyptic number.

121212000112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212000112100 is an abundant number, since it is smaller than the sum of its proper divisors (146412397158340).

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

121212000112100 is a wasteful number, since it uses less digits than its factorization.

121212000112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61726689 (or 61726682 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121212000112100 its reverse (1211000212121), we get a palindrome (122423000324221).

The spelling of 121212000112100 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred twelve thousand, one hundred".