1212211012100 has 36 divisors (see below), whose sum is σ = 2869634071248. Its totient is φ = 440804004000.

The previous prime is 1212211012097. The next prime is 1212211012151. The reversal of 1212211012100 is 12101122121.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 551003906 + ... + 551006105.

Almost surely, 2^{1212211012100} is an apocalyptic number.

1212211012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212211012100 is an abundant number, since it is smaller than the sum of its proper divisors (1657423059148).

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

1212211012100 is a wasteful number, since it uses less digits than its factorization.

1212211012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102010036 (or 1102010029 counting only the distinct ones).

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

Adding to 1212211012100 its reverse (12101122121), we get a palindrome (1224312134221).

The spelling of 1212211012100 in words is "one trillion, two hundred twelve billion, two hundred eleven million, twelve thousand, one hundred".