220221121210020 has 144 divisors (see below), whose sum is σ = 763673231962368. Its totient is φ = 50320431325440.

The previous prime is 220221121210001. The next prime is 220221121210061. The reversal of 220221121210020 is 20012121122022.

It is a happy number.

220221121210020 is a `hidden beast` number, since 2 + 202 + 211 + 21 + 210 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 220221121209975 and 220221121210002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23464224 + ... + 31480343.

It is an arithmetic number, because the mean of its divisors is an integer number (5303286333072).

Almost surely, 2^{220221121210020} is an apocalyptic number.

220221121210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220221121210020 is an abundant number, since it is smaller than the sum of its proper divisors (543452110752348).

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

220221121210020 is a wasteful number, since it uses less digits than its factorization.

220221121210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54947770 (or 54947765 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 220221121210020 its reverse (20012121122022), we get a palindrome (240233242332042).

The spelling of 220221121210020 in words is "two hundred twenty trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred ten thousand, twenty".