20311220122115 has 8 divisors (see below), whose sum is σ = 26248346004048. Its totient is φ = 14999054859360.

The previous prime is 20311220122021. The next prime is 20311220122133. The reversal of 20311220122115 is 51122102211302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20311220122115 - 2¹⁸ = 20311219859971 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156240154721 + ... + 156240154850.

It is an arithmetic number, because the mean of its divisors is an integer number (3281043250506).

Almost surely, 2^{20311220122115} is an apocalyptic number.

20311220122115 is a deficient number, since it is larger than the sum of its proper divisors (5937125881933).

20311220122115 is a wasteful number, since it uses less digits than its factorization.

20311220122115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312480309589.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 20311220122115 its reverse (51122102211302), we get a palindrome (71433322333417).

The spelling of 20311220122115 in words is "twenty trillion, three hundred eleven billion, two hundred twenty million, one hundred twenty-two thousand, one hundred fifteen".