212001210121100 has 72 divisors (see below), whose sum is σ = 476568069566400. Its totient is φ = 81762453337600.

The previous prime is 212001210121081. The next prime is 212001210121241. The reversal of 212001210121100 is 1121012100212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48752081 + ... + 52922280.

It is an arithmetic number, because the mean of its divisors is an integer number (6619000966200).

Almost surely, 2^{212001210121100} is an apocalyptic number.

212001210121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212001210121100 is an abundant number, since it is smaller than the sum of its proper divisors (264566859445300).

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

212001210121100 is a wasteful number, since it uses less digits than its factorization.

212001210121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101675123 (or 101675116 counting only the distinct ones).

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

Adding to 212001210121100 its reverse (1121012100212), we get a palindrome (213122222221312).

The spelling of 212001210121100 in words is "two hundred twelve trillion, one billion, two hundred ten million, one hundred twenty-one thousand, one hundred".