2120122156249 has 2 divisors, whose sum is σ = 2120122156250. Its totient is φ = 2120122156248.

The previous prime is 2120122156219. The next prime is 2120122156261. The reversal of 2120122156249 is 9426512210212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1521046156249 + 599076000000 = 1233307^2 + 774000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120122156249 - 2¹³ = 2120122148057 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120122156219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060061078124 + 1060061078125.

It is an arithmetic number, because the mean of its divisors is an integer number (1060061078125).

Almost surely, 2^{2120122156249} is an apocalyptic number.

It is an amenable number.

2120122156249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120122156249 is an equidigital number, since it uses as much as digits as its factorization.

2120122156249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 2120122156249 in words is "two trillion, one hundred twenty billion, one hundred twenty-two million, one hundred fifty-six thousand, two hundred forty-nine".