20312133101 has 4 divisors (see below), whose sum is σ = 21874604892. Its totient is φ = 18749661312.

The previous prime is 20312133097. The next prime is 20312133139. The reversal of 20312133101 is 10133121302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10624455625 + 9687677476 = 103075^2 + 98426^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312133101 - 2² = 20312133097 is a prime.

It is a super-2 number, since 2×20312133101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20312133101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312133301) 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, 781235876 + ... + 781235901.

It is an arithmetic number, because the mean of its divisors is an integer number (5468651223).

Almost surely, 2^20312133101 is an apocalyptic number.

It is an amenable number.

20312133101 is a deficient number, since it is larger than the sum of its proper divisors (1562471791).

20312133101 is a wasteful number, since it uses less digits than its factorization.

20312133101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562471790.

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

Adding to 20312133101 its reverse (10133121302), we get a palindrome (30445254403).

The spelling of 20312133101 in words is "twenty billion, three hundred twelve million, one hundred thirty-three thousand, one hundred one".