20032201021 has 48 divisors (see below), whose sum is σ = 24369486336. Its totient is φ = 16405369344.

The previous prime is 20032201019. The next prime is 20032201027. The reversal of 20032201021 is 12010223002.

It is not a de Polignac number, because 20032201021 - 2¹ = 20032201019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20032200992 and 20032201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032201027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41133640 + ... + 41134126.

It is an arithmetic number, because the mean of its divisors is an integer number (507697632).

Almost surely, 2^20032201021 is an apocalyptic number.

It is an amenable number.

20032201021 is a deficient number, since it is larger than the sum of its proper divisors (4337285315).

20032201021 is a wasteful number, since it uses less digits than its factorization.

20032201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20032201021 its reverse (12010223002), we get a palindrome (32042424023).

The spelling of 20032201021 in words is "twenty billion, thirty-two million, two hundred one thousand, twenty-one".