20122109939 has 2 divisors, whose sum is σ = 20122109940. Its totient is φ = 20122109938.

The previous prime is 20122109927. The next prime is 20122109957. The reversal of 20122109939 is 93990122102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122109939 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20122109989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061054969 + 10061054970.

It is an arithmetic number, because the mean of its divisors is an integer number (10061054970).

Almost surely, 2^20122109939 is an apocalyptic number.

20122109939 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122109939 is an equidigital number, since it uses as much as digits as its factorization.

20122109939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 20122109939 in words is "twenty billion, one hundred twenty-two million, one hundred nine thousand, nine hundred thirty-nine".