39220570021 has 16 divisors (see below), whose sum is σ = 40901958000. Its totient is φ = 37561563648.

The previous prime is 39220570019. The next prime is 39220570027. The reversal of 39220570021 is 12007502293.

39220570021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 898200900 + 38322369121 = 29970^2 + 195761^2 .

It is a cyclic number.

It is not a de Polignac number, because 39220570021 - 2¹ = 39220570019 is a prime.

It is a super-2 number, since 2×39220570021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39220570027) 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, 6150991 + ... + 6157363.

It is an arithmetic number, because the mean of its divisors is an integer number (2556372375).

Almost surely, 2^39220570021 is an apocalyptic number.

It is an amenable number.

39220570021 is a deficient number, since it is larger than the sum of its proper divisors (1681387979).

39220570021 is a wasteful number, since it uses less digits than its factorization.

39220570021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8088.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 39220570021 in words is "thirty-nine billion, two hundred twenty million, five hundred seventy thousand, twenty-one".