213221023122020 has 12 divisors (see below), whose sum is σ = 447764148556284. Its totient is φ = 85288409248800.

The previous prime is 213221023121963. The next prime is 213221023122103. The reversal of 213221023122020 is 20221320122312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52988616131584 + 160232406990436 = 7279328^2 + 12658294^2 .

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, 5330525578031 + ... + 5330525578070.

It is an arithmetic number, because the mean of its divisors is an integer number (37313679046357).

Almost surely, 2^{213221023122020} is an apocalyptic number.

213221023122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213221023122020 is an abundant number, since it is smaller than the sum of its proper divisors (234543125434264).

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

213221023122020 is a wasteful number, since it uses less digits than its factorization.

213221023122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10661051156110 (or 10661051156108 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 213221023122020 its reverse (20221320122312), we get a palindrome (233442343244332).

The spelling of 213221023122020 in words is "two hundred thirteen trillion, two hundred twenty-one billion, twenty-three million, one hundred twenty-two thousand, twenty".