220021012020 has 24 divisors (see below), whose sum is σ = 616058833824. Its totient is φ = 58672269856.

The previous prime is 220021012009. The next prime is 220021012033. The reversal of 220021012020 is 20210120022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 220021011987 and 220021012005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1833508374 + ... + 1833508493.

It is an arithmetic number, because the mean of its divisors is an integer number (25669118076).

Almost surely, 2^220021012020 is an apocalyptic number.

220021012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021012020 is an abundant number, since it is smaller than the sum of its proper divisors (396037821804).

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

220021012020 is a wasteful number, since it uses less digits than its factorization.

220021012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3667016879 (or 3667016877 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 220021012020 its reverse (20210120022), we get a palindrome (240231132042).

The spelling of 220021012020 in words is "two hundred twenty billion, twenty-one million, twelve thousand, twenty".