212021021220100 has 72 divisors (see below), whose sum is σ = 464560182439808. Its totient is φ = 83983630982400.

The previous prime is 212021021220061. The next prime is 212021021220181. The reversal of 212021021220100 is 1022120120212.

It is a happy number.

212021021220100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 803340160 + ... + 803604040.

Almost surely, 2^{212021021220100} is an apocalyptic number.

212021021220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021021220100 is an abundant number, since it is smaller than the sum of its proper divisors (252539161219708).

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

212021021220100 is a wasteful number, since it uses less digits than its factorization.

212021021220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342005 (or 341998 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212021021220100 its reverse (1022120120212), we get a palindrome (213043141340312).

The spelling of 212021021220100 in words is "two hundred twelve trillion, twenty-one billion, twenty-one million, two hundred twenty thousand, one hundred".