133132220021 has 4 divisors (see below), whose sum is σ = 133371237132. Its totient is φ = 132893202912.

The previous prime is 133132219999. The next prime is 133132220027. The reversal of 133132220021 is 120022231331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120022231331 = 3329 ⋅36053539.

It can be written as a sum of positive squares in 2 ways, for example, as 61757220100 + 71374999921 = 248510^2 + 267161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133132220021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133132219975 and 133132220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133132220027) 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, 119507720 + ... + 119508833.

It is an arithmetic number, because the mean of its divisors is an integer number (33342809283).

Almost surely, 2^133132220021 is an apocalyptic number.

It is an amenable number.

133132220021 is a deficient number, since it is larger than the sum of its proper divisors (239017111).

133132220021 is an equidigital number, since it uses as much as digits as its factorization.

133132220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239017110.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 133132220021 its reverse (120022231331), we get a palindrome (253154451352).

The spelling of 133132220021 in words is "one hundred thirty-three billion, one hundred thirty-two million, two hundred twenty thousand, twenty-one".