1213652312100 has 54 divisors (see below), whose sum is σ = 3804125749970. Its totient is φ = 323640616320.

The previous prime is 1213652312087. The next prime is 1213652312153. The reversal of 1213652312100 is 12132563121.

1213652312100 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 652 + 3 + 1 + 2 + 1 + 0 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 266113603044 + 947538709056 = 515862^2 + 973416^2 .

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, 674250385 + ... + 674252184.

Almost surely, 2^{1213652312100} is an apocalyptic number.

1213652312100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213652312100 is an abundant number, since it is smaller than the sum of its proper divisors (2590473437870).

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

1213652312100 is a wasteful number, since it uses less digits than its factorization.

1213652312100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348502589 (or 1348502579 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 1213652312100 its reverse (12132563121), we get a palindrome (1225784875221).

The spelling of 1213652312100 in words is "one trillion, two hundred thirteen billion, six hundred fifty-two million, three hundred twelve thousand, one hundred".