212122012100 has 36 divisors (see below), whose sum is σ = 470098495104. Its totient is φ = 83043509280.

The previous prime is 212122012097. The next prime is 212122012139. The reversal of 212122012100 is 1210221212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22561472 + ... + 22570871.

Almost surely, 2^212122012100 is an apocalyptic number.

212122012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212122012100 is an abundant number, since it is smaller than the sum of its proper divisors (257976483004).

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

212122012100 is a wasteful number, since it uses less digits than its factorization.

212122012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45132404 (or 45132397 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212122012100 its reverse (1210221212), we get a palindrome (213332233312).

The spelling of 212122012100 in words is "two hundred twelve billion, one hundred twenty-two million, twelve thousand, one hundred".