21133133122 has 4 divisors (see below), whose sum is σ = 31699699686. Its totient is φ = 10566566560.

The previous prime is 21133133117. The next prime is 21133133129. The reversal of 21133133122 is 22133133112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20914655161 + 218477961 = 144619^2 + 14781^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21133133093 and 21133133102.

It is not an unprimeable number, because it can be changed into a prime (21133133129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5283283279 + ... + 5283283282.

Almost surely, 2^21133133122 is an apocalyptic number.

21133133122 is a deficient number, since it is larger than the sum of its proper divisors (10566566564).

21133133122 is a wasteful number, since it uses less digits than its factorization.

21133133122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10566566563.

The product of its digits is 648, while the sum is 22.

Adding to 21133133122 its reverse (22133133112), we get a palindrome (43266266234).

The spelling of 21133133122 in words is "twenty-one billion, one hundred thirty-three million, one hundred thirty-three thousand, one hundred twenty-two".