12210691900 has 72 divisors (see below), whose sum is σ = 29687381136. Its totient is φ = 4320230400.

The previous prime is 12210691819. The next prime is 12210691901. The reversal of 12210691900 is 919601221.

It is a super-2 number, since 2×12210691900² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210691901) 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, 109309 + ... + 190708.

It is an arithmetic number, because the mean of its divisors is an integer number (412324738).

Almost surely, 2^12210691900 is an apocalyptic number.

12210691900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12210691900 is an abundant number, since it is smaller than the sum of its proper divisors (17476689236).

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

12210691900 is a wasteful number, since it uses less digits than its factorization.

12210691900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300079 (or 300072 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 12210691900 in words is "twelve billion, two hundred ten million, six hundred ninety-one thousand, nine hundred".