212221010000020 has 96 divisors (see below), whose sum is σ = 522706125666816. Its totient is φ = 70873836019200.

The previous prime is 212221010000011. The next prime is 212221010000089. The reversal of 212221010000020 is 20000010122212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119752591 + ... + 121511830.

It is an arithmetic number, because the mean of its divisors is an integer number (5444855475696).

Almost surely, 2^{212221010000020} is an apocalyptic number.

212221010000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221010000020 is an abundant number, since it is smaller than the sum of its proper divisors (310485115666796).

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

212221010000020 is a wasteful number, since it uses less digits than its factorization.

212221010000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241264601 (or 241264599 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212221010000020 its reverse (20000010122212), we get a palindrome (232221020122232).

The spelling of 212221010000020 in words is "two hundred twelve trillion, two hundred twenty-one billion, ten million, twenty", and thus it is an aban number.