20122116161 has 16 divisors (see below), whose sum is σ = 23569902720. Its totient is φ = 16818069120.

The previous prime is 20122116101. The next prime is 20122116167. The reversal of 20122116161 is 16161122102.

It is a cyclic number.

It is not a de Polignac number, because 20122116161 - 2¹⁸ = 20121854017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20122116167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564455 + ... + 599043.

It is an arithmetic number, because the mean of its divisors is an integer number (1473118920).

Almost surely, 2^20122116161 is an apocalyptic number.

It is an amenable number.

20122116161 is a deficient number, since it is larger than the sum of its proper divisors (3447786559).

20122116161 is a wasteful number, since it uses less digits than its factorization.

20122116161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36664.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 20122116161 its reverse (16161122102), we get a palindrome (36283238263).

The spelling of 20122116161 in words is "twenty billion, one hundred twenty-two million, one hundred sixteen thousand, one hundred sixty-one".