212222121012100 has 72 divisors (see below), whose sum is σ = 470337452413920. Its totient is φ = 83091899086080.

The previous prime is 212222121012073. The next prime is 212222121012163. The reversal of 212222121012100 is 1210121222212.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75813822 + ... + 78563221.

It is an arithmetic number, because the mean of its divisors is an integer number (6532464616860).

Almost surely, 2^{212222121012100} is an apocalyptic number.

212222121012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212222121012100 is an abundant number, since it is smaller than the sum of its proper divisors (258115331401820).

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

212222121012100 is a wasteful number, since it uses less digits than its factorization.

212222121012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154377349 (or 154377342 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212222121012100 its reverse (1210121222212), we get a palindrome (213432242234312).

The spelling of 212222121012100 in words is "two hundred twelve trillion, two hundred twenty-two billion, one hundred twenty-one million, twelve thousand, one hundred".