133121313510 has 16 divisors (see below), whose sum is σ = 319491152496. Its totient is φ = 35499016928.

The previous prime is 133121313503. The next prime is 133121313527. The reversal of 133121313510 is 15313121331.

It is a happy number.

It is a super-2 number, since 2×133121313510² (a number of 23 digits) contains 22 as substring.

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, 2218688529 + ... + 2218688588.

It is an arithmetic number, because the mean of its divisors is an integer number (19968197031).

Almost surely, 2^133121313510 is an apocalyptic number.

133121313510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133121313510 is an abundant number, since it is smaller than the sum of its proper divisors (186369838986).

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

133121313510 is a wasteful number, since it uses less digits than its factorization.

133121313510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4437377127.

The product of its (nonzero) digits is 810, while the sum is 24.

Adding to 133121313510 its reverse (15313121331), we get a palindrome (148434434841).

The spelling of 133121313510 in words is "one hundred thirty-three billion, one hundred twenty-one million, three hundred thirteen thousand, five hundred ten".