220102021020 has 72 divisors (see below), whose sum is σ = 716903735184. Its totient is φ = 50309032704.

The previous prime is 220102020973. The next prime is 220102021021. The reversal of 220102021020 is 20120201022.

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 = 220102020987 and 220102021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220102021021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37429377 + ... + 37435256.

It is an arithmetic number, because the mean of its divisors is an integer number (9956996322).

Almost surely, 2^220102021020 is an apocalyptic number.

220102021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220102021020 is an abundant number, since it is smaller than the sum of its proper divisors (496801714164).

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

220102021020 is a wasteful number, since it uses less digits than its factorization.

220102021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74864659 (or 74864650 counting only the distinct ones).

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

Adding to 220102021020 its reverse (20120201022), we get a palindrome (240222222042).

The spelling of 220102021020 in words is "two hundred twenty billion, one hundred two million, twenty-one thousand, twenty".