10221220020 has 96 divisors (see below), whose sum is σ = 31237226496. Its totient is φ = 2476598400.

The previous prime is 10221219997. The next prime is 10221220073. The reversal of 10221220020 is 2002212201.

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 = 10221219978 and 10221220005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2235777 + ... + 2240343.

It is an arithmetic number, because the mean of its divisors is an integer number (325387776).

Almost surely, 2^10221220020 is an apocalyptic number.

10221220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10221220020 is an abundant number, since it is smaller than the sum of its proper divisors (21016006476).

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

10221220020 is a wasteful number, since it uses less digits than its factorization.

10221220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7981 (or 7979 counting only the distinct ones).

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

Adding to 10221220020 its reverse (2002212201), we get a palindrome (12223432221).

The spelling of 10221220020 in words is "ten billion, two hundred twenty-one million, two hundred twenty thousand, twenty".