212122211221020 has 48 divisors (see below), whose sum is σ = 593948994726528. Its totient is φ = 56565275058240.

The previous prime is 212122211220991. The next prime is 212122211221069. The reversal of 212122211221020 is 20122112221212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14954734 + ... + 25453653.

It is an arithmetic number, because the mean of its divisors is an integer number (12373937390136).

Almost surely, 2^{212122211221020} is an apocalyptic number.

212122211221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212122211221020 is an abundant number, since it is smaller than the sum of its proper divisors (381826783505508).

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

212122211221020 is a wasteful number, since it uses less digits than its factorization.

212122211221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40495890 (or 40495888 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212122211221020 its reverse (20122112221212), we get a palindrome (232244323442232).

The spelling of 212122211221020 in words is "two hundred twelve trillion, one hundred twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, twenty".