33101221020 has 96 divisors (see below), whose sum is σ = 107922544128. Its totient is φ = 7423233792.

The previous prime is 33101221019. The next prime is 33101221031. The reversal of 33101221020 is 2012210133.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 721254 + ... + 765773.

It is an arithmetic number, because the mean of its divisors is an integer number (1124193168).

Almost surely, 2^33101221020 is an apocalyptic number.

33101221020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33101221020 is an abundant number, since it is smaller than the sum of its proper divisors (74821323108).

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

33101221020 is a wasteful number, since it uses less digits than its factorization.

33101221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487099 (or 1487097 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 33101221020 its reverse (2012210133), we get a palindrome (35113431153).

The spelling of 33101221020 in words is "thirty-three billion, one hundred one million, two hundred twenty-one thousand, twenty".