133121230100 has 18 divisors (see below), whose sum is σ = 288873069534. Its totient is φ = 53248492000.

The previous prime is 133121230091. The next prime is 133121230141. The reversal of 133121230100 is 1032121331.

It can be written as a sum of positive squares in 3 ways, for example, as 19031306116 + 114089923984 = 137954^2 + 337772^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 665606051 + ... + 665606250.

It is an arithmetic number, because the mean of its divisors is an integer number (16048503863).

Almost surely, 2^133121230100 is an apocalyptic number.

133121230100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133121230100 is an abundant number, since it is smaller than the sum of its proper divisors (155751839434).

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

133121230100 is a wasteful number, since it uses less digits than its factorization.

133121230100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331212315 (or 1331212308 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 133121230100 its reverse (1032121331), we get a palindrome (134153351431).

The spelling of 133121230100 in words is "one hundred thirty-three billion, one hundred twenty-one million, two hundred thirty thousand, one hundred".