33021021020 has 48 divisors (see below), whose sum is σ = 75792950688. Its totient is φ = 12010394880.

The previous prime is 33021020941. The next prime is 33021021067. The reversal of 33021021020 is 2012012033.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 33021020986 and 33021021004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930371 + ... + 965210.

It is an arithmetic number, because the mean of its divisors is an integer number (1579019806).

Almost surely, 2^33021021020 is an apocalyptic number.

It is an amenable number.

33021021020 is an abundant number, since it is smaller than the sum of its proper divisors (42771929668).

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

33021021020 is a wasteful number, since it uses less digits than its factorization.

33021021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895670 (or 1895668 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 33021021020 its reverse (2012012033), we get a palindrome (35033033053).

The spelling of 33021021020 in words is "thirty-three billion, twenty-one million, twenty-one thousand, twenty".