21320311122133 has 4 divisors (see below), whose sum is σ = 22442432760160. Its totient is φ = 20198189484108.

The previous prime is 21320311122127. The next prime is 21320311122139. The reversal of 21320311122133 is 33122111302312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21320311122127) and next prime (21320311122139).

It is a cyclic number.

It is not a de Polignac number, because 21320311122133 - 2⁹ = 21320311121621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21320311122098 and 21320311122107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320311122139) 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, 561060818985 + ... + 561060819022.

It is an arithmetic number, because the mean of its divisors is an integer number (5610608190040).

Almost surely, 2^{21320311122133} is an apocalyptic number.

It is an amenable number.

21320311122133 is a deficient number, since it is larger than the sum of its proper divisors (1122121638027).

21320311122133 is a wasteful number, since it uses less digits than its factorization.

21320311122133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122121638026.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21320311122133 its reverse (33122111302312), we get a palindrome (54442422424445).

The spelling of 21320311122133 in words is "twenty-one trillion, three hundred twenty billion, three hundred eleven million, one hundred twenty-two thousand, one hundred thirty-three".