133111220 has 24 divisors (see below), whose sum is σ = 304946208. Its totient is φ = 48404000.

The previous prime is 133111219. The next prime is 133111261. The reversal of 133111220 is 22111331.

It is a junction number, because it is equal to n+sod(n) for n = 133111195 and 133111204.

It is a congruent number.

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, 302306 + ... + 302745.

It is an arithmetic number, because the mean of its divisors is an integer number (12706092).

Almost surely, 2^133111220 is an apocalyptic number.

133111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133111220 is an abundant number, since it is smaller than the sum of its proper divisors (171834988).

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

133111220 is a wasteful number, since it uses less digits than its factorization.

133111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605071 (or 605069 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 133111220 is about 11537.3835855449. The cubic root of 133111220 is about 510.5891180234.

Adding to 133111220 its reverse (22111331), we get a palindrome (155222551).

It can be divided in two parts, 133111 and 220, that added together give a palindrome (133331).

The spelling of 133111220 in words is "one hundred thirty-three million, one hundred eleven thousand, two hundred twenty".