20200120122137 has 2 divisors, whose sum is σ = 20200120122138. Its totient is φ = 20200120122136.

The previous prime is 20200120122101. The next prime is 20200120122211. The reversal of 20200120122137 is 73122102100202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20175404823616 + 24715298521 = 4491704^2 + 157211^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200120122137 - 2⁶ = 20200120122073 is a prime.

It is not a weakly prime, because it can be changed into another prime (20200120122437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100060061068 + 10100060061069.

It is an arithmetic number, because the mean of its divisors is an integer number (10100060061069).

Almost surely, 2^{20200120122137} is an apocalyptic number.

It is an amenable number.

20200120122137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200120122137 is an equidigital number, since it uses as much as digits as its factorization.

20200120122137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 20200120122137 its reverse (73122102100202), we get a palindrome (93322222222339).

The spelling of 20200120122137 in words is "twenty trillion, two hundred billion, one hundred twenty million, one hundred twenty-two thousand, one hundred thirty-seven".