212221023020 has 12 divisors (see below), whose sum is σ = 445664148384. Its totient is φ = 84888409200.

The previous prime is 212221023017. The next prime is 212221023107. The reversal of 212221023020 is 20320122212.

It is a super-2 number, since 2×212221023020² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212221023020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5305525556 + ... + 5305525595.

It is an arithmetic number, because the mean of its divisors is an integer number (37138679032).

Almost surely, 2^212221023020 is an apocalyptic number.

212221023020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221023020 is an abundant number, since it is smaller than the sum of its proper divisors (233443125364).

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

212221023020 is a wasteful number, since it uses less digits than its factorization.

212221023020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611051160 (or 10611051158 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 212221023020 its reverse (20320122212), we get a palindrome (232541145232).

The spelling of 212221023020 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-three thousand, twenty".