20123113013149 has 2 divisors, whose sum is σ = 20123113013150. Its totient is φ = 20123113013148.

The previous prime is 20123113013099. The next prime is 20123113013173. The reversal of 20123113013149 is 94131031132102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12485572781049 + 7637540232100 = 3533493^2 + 2763610^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123113013149 - 2¹¹ = 20123113011101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20123113013149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123113017149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061556506574 + 10061556506575.

It is an arithmetic number, because the mean of its divisors is an integer number (10061556506575).

Almost surely, 2^{20123113013149} is an apocalyptic number.

It is an amenable number.

20123113013149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123113013149 is an equidigital number, since it uses as much as digits as its factorization.

20123113013149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 20123113013149 in words is "twenty trillion, one hundred twenty-three billion, one hundred thirteen million, thirteen thousand, one hundred forty-nine".