121220120319751 has 2 divisors, whose sum is σ = 121220120319752. Its totient is φ = 121220120319750.

The previous prime is 121220120319743. The next prime is 121220120319821. The reversal of 121220120319751 is 157913021022121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121220120319751 - 2³ = 121220120319743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121220120319751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220120319731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610060159875 + 60610060159876.

It is an arithmetic number, because the mean of its divisors is an integer number (60610060159876).

Almost surely, 2^{121220120319751} is an apocalyptic number.

121220120319751 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220120319751 is an equidigital number, since it uses as much as digits as its factorization.

121220120319751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 121220120319751 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty million, three hundred nineteen thousand, seven hundred fifty-one".