121262012100 has 54 divisors (see below), whose sum is σ = 380089042970. Its totient is φ = 32336536320.

The previous prime is 121262012093. The next prime is 121262012149. The reversal of 121262012100 is 1210262121.

121262012100 is a `hidden beast` number, since 1 + 21 + 2 + 620 + 1 + 21 + 0 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 174715524 + 121087296576 = 13218^2 + 347976^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 67366885 + ... + 67368684.

Almost surely, 2^121262012100 is an apocalyptic number.

121262012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121262012100 is an abundant number, since it is smaller than the sum of its proper divisors (258827030870).

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

121262012100 is a wasteful number, since it uses less digits than its factorization.

121262012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134735589 (or 134735579 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121262012100 its reverse (1210262121), we get a palindrome (122472274221).

The spelling of 121262012100 in words is "one hundred twenty-one billion, two hundred sixty-two million, twelve thousand, one hundred".