33220131021 has 32 divisors (see below), whose sum is σ = 61358976000. Its totient is φ = 17257209840.

The previous prime is 33220131013. The next prime is 33220131073. The reversal of 33220131021 is 12013102233.

33220131021 is a `hidden beast` number, since 332 + 2 + 0 + 1 + 310 + 21 = 666.

It is not a de Polignac number, because 33220131021 - 2³ = 33220131013 is a prime.

It is a super-2 number, since 2×33220131021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33220130985 and 33220131003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33220131421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7987371 + ... + 7991528.

It is an arithmetic number, because the mean of its divisors is an integer number (1917468000).

Almost surely, 2^33220131021 is an apocalyptic number.

It is an amenable number.

33220131021 is a deficient number, since it is larger than the sum of its proper divisors (28138844979).

33220131021 is a wasteful number, since it uses less digits than its factorization.

33220131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15978926 (or 15978920 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 33220131021 its reverse (12013102233), we get a palindrome (45233233254).

The spelling of 33220131021 in words is "thirty-three billion, two hundred twenty million, one hundred thirty-one thousand, twenty-one".