133021010021 has 4 divisors (see below), whose sum is σ = 136616172492. Its totient is φ = 129425847552.

The previous prime is 133021009999. The next prime is 133021010141. The reversal of 133021010021 is 120010120331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120010120331 = 17 ⋅7059418843.

It can be written as a sum of positive squares in 2 ways, for example, as 98614840900 + 34406169121 = 314030^2 + 185489^2 .

It is a cyclic number.

It is not a de Polignac number, because 133021010021 - 2³⁴ = 115841140837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133021009978 and 133021010005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133021015021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1797581180 + ... + 1797581253.

It is an arithmetic number, because the mean of its divisors is an integer number (34154043123).

Almost surely, 2^133021010021 is an apocalyptic number.

It is an amenable number.

133021010021 is a deficient number, since it is larger than the sum of its proper divisors (3595162471).

133021010021 is an equidigital number, since it uses as much as digits as its factorization.

133021010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3595162470.

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

Adding to 133021010021 its reverse (120010120331), we get a palindrome (253031130352).

The spelling of 133021010021 in words is "one hundred thirty-three billion, twenty-one million, ten thousand, twenty-one".