133101220 has 24 divisors (see below), whose sum is σ = 319443264. Its totient is φ = 45634656.

The previous prime is 133101217. The next prime is 133101233. The reversal of 133101220 is 22101331.

It is a self number, because there is not a number n which added to its sum of digits gives 133101220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475222 + ... + 475501.

It is an arithmetic number, because the mean of its divisors is an integer number (13310136).

Almost surely, 2^133101220 is an apocalyptic number.

133101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133101220 is an abundant number, since it is smaller than the sum of its proper divisors (186342044).

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

133101220 is a wasteful number, since it uses less digits than its factorization.

133101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950739 (or 950737 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 133101220 is about 11536.9502035850. The cubic root of 133101220 is about 510.5763316757.

Adding to 133101220 its reverse (22101331), we get a palindrome (155202551).

The spelling of 133101220 in words is "one hundred thirty-three million, one hundred one thousand, two hundred twenty".