20013122311 has 32 divisors (see below), whose sum is σ = 25185742848. Its totient is φ = 15479095680.

The previous prime is 20013122299. The next prime is 20013122323. The reversal of 20013122311 is 11322131002.

It is an interprime number because it is at equal distance from previous prime (20013122299) and next prime (20013122323).

It is a cyclic number.

It is not a de Polignac number, because 20013122311 - 2¹¹ = 20013120263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013122341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4364526 + ... + 4369108.

It is an arithmetic number, because the mean of its divisors is an integer number (787054464).

Almost surely, 2^20013122311 is an apocalyptic number.

20013122311 is a deficient number, since it is larger than the sum of its proper divisors (5172620537).

20013122311 is a wasteful number, since it uses less digits than its factorization.

20013122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20013122311 its reverse (11322131002), we get a palindrome (31335253313).

The spelling of 20013122311 in words is "twenty billion, thirteen million, one hundred twenty-two thousand, three hundred eleven".