10002221220 has 48 divisors (see below), whose sum is σ = 28971956160. Its totient is φ = 2575284096.

The previous prime is 10002221219. The next prime is 10002221227. The reversal of 10002221220 is 2212220001.

It is a super-5 number, since 5×10002221220⁵ (a number of 51 digits) contains 55555 as substring.

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 = 10002221196 and 10002221205.

It is not an unprimeable number, because it can be changed into a prime (10002221227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2872462 + ... + 2875941.

It is an arithmetic number, because the mean of its divisors is an integer number (603582420).

Almost surely, 2^10002221220 is an apocalyptic number.

10002221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10002221220 is an abundant number, since it is smaller than the sum of its proper divisors (18969734940).

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

10002221220 is a wasteful number, since it uses less digits than its factorization.

10002221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5748444 (or 5748442 counting only the distinct ones).

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

Adding to 10002221220 its reverse (2212220001), we get a palindrome (12214441221).

The spelling of 10002221220 in words is "ten billion, two million, two hundred twenty-one thousand, two hundred twenty".