10020021220 has 48 divisors (see below), whose sum is σ = 23042371968. Its totient is φ = 3629768960.

The previous prime is 10020021211. The next prime is 10020021233. The reversal of 10020021220 is 2212002001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10020021197 and 10020021206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28729 + ... + 144448.

It is an arithmetic number, because the mean of its divisors is an integer number (480049416).

Almost surely, 2^10020021220 is an apocalyptic number.

10020021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10020021220 is an abundant number, since it is smaller than the sum of its proper divisors (13022350748).

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

10020021220 is a wasteful number, since it uses less digits than its factorization.

10020021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173460 (or 173458 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 10020021220 its reverse (2212002001), we get a palindrome (12232023221).

The spelling of 10020021220 in words is "ten billion, twenty million, twenty-one thousand, two hundred twenty".