221004002020 has 24 divisors (see below), whose sum is σ = 488535163200. Its totient is φ = 83748884832.

The previous prime is 221004002017. The next prime is 221004002159. The reversal of 221004002020 is 20200400122.

It is a super-4 number, since 4×221004002020⁴ (a number of 46 digits) contains 4444 as substring.

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, 290794360 + ... + 290795119.

It is an arithmetic number, because the mean of its divisors is an integer number (20355631800).

Almost surely, 2^221004002020 is an apocalyptic number.

221004002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221004002020 is an abundant number, since it is smaller than the sum of its proper divisors (267531161180).

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

221004002020 is a wasteful number, since it uses less digits than its factorization.

221004002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581589507 (or 581589505 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 221004002020 its reverse (20200400122), we get a palindrome (241204402142).

The spelling of 221004002020 in words is "two hundred twenty-one billion, four million, two thousand, twenty".