33020221031 has 16 divisors (see below), whose sum is σ = 40886486784. Its totient is φ = 26018665344.

The previous prime is 33020221027. The next prime is 33020221037. The reversal of 33020221031 is 13012202033.

It is not a de Polignac number, because 33020221031 - 2² = 33020221027 is a prime.

It is a super-2 number, since 2×33020221031² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33020221037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3221405 + ... + 3231638.

It is an arithmetic number, because the mean of its divisors is an integer number (2555405424).

Almost surely, 2^33020221031 is an apocalyptic number.

33020221031 is a deficient number, since it is larger than the sum of its proper divisors (7866265753).

33020221031 is a wasteful number, since it uses less digits than its factorization.

33020221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6453110.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 33020221031 its reverse (13012202033), we get a palindrome (46032423064).

The spelling of 33020221031 in words is "thirty-three billion, twenty million, two hundred twenty-one thousand, thirty-one".