133030121021 has 6 divisors (see below), whose sum is σ = 154749324510. Its totient is φ = 114025817976.

The previous prime is 133030120991. The next prime is 133030121087. The reversal of 133030121021 is 120121030331.

It can be written as a sum of positive squares in only one way, i.e., 131341732921 + 1688388100 = 362411^2 + 41090^2 .

It is not a de Polignac number, because 133030121021 - 2¹⁴ = 133030104637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133030121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1357450166 + ... + 1357450263.

It is an arithmetic number, because the mean of its divisors is an integer number (25791554085).

Almost surely, 2^133030121021 is an apocalyptic number.

It is an amenable number.

133030121021 is a deficient number, since it is larger than the sum of its proper divisors (21719203489).

133030121021 is an equidigital number, since it uses as much as digits as its factorization.

133030121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714900443 (or 2714900436 counting only the distinct ones).

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

Adding to 133030121021 its reverse (120121030331), we get a palindrome (253151151352).

The spelling of 133030121021 in words is "one hundred thirty-three billion, thirty million, one hundred twenty-one thousand, twenty-one".