33121332020 has 48 divisors (see below), whose sum is σ = 79564291968. Its totient is φ = 11345443200.

The previous prime is 33121332017. The next prime is 33121332043. The reversal of 33121332020 is 2023312133.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33121331983 and 33121332001.

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, 44795 + ... + 261245.

It is an arithmetic number, because the mean of its divisors is an integer number (1657589416).

Almost surely, 2^33121332020 is an apocalyptic number.

It is an amenable number.

33121332020 is an abundant number, since it is smaller than the sum of its proper divisors (46442959948).

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

33121332020 is a wasteful number, since it uses less digits than its factorization.

33121332020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217560 (or 217558 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 33121332020 its reverse (2023312133), we get a palindrome (35144644153).

The spelling of 33121332020 in words is "thirty-three billion, one hundred twenty-one million, three hundred thirty-two thousand, twenty".