133140021 has 16 divisors (see below), whose sum is σ = 204019200. Its totient is φ = 75652848.

The previous prime is 133140019. The next prime is 133140037. The reversal of 133140021 is 120041331.

It is not a de Polignac number, because 133140021 - 2¹ = 133140019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133140041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13951 + ... + 21468.

It is an arithmetic number, because the mean of its divisors is an integer number (12751200).

Almost surely, 2^133140021 is an apocalyptic number.

It is an amenable number.

133140021 is a deficient number, since it is larger than the sum of its proper divisors (70879179).

133140021 is a wasteful number, since it uses less digits than its factorization.

133140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35608.

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

The square root of 133140021 is about 11538.6316779764. The cubic root of 133140021 is about 510.6259404058.

Adding to 133140021 its reverse (120041331), we get a palindrome (253181352).

The spelling of 133140021 in words is "one hundred thirty-three million, one hundred forty thousand, twenty-one".