121756525441 has 2 divisors, whose sum is σ = 121756525442. Its totient is φ = 121756525440.

The previous prime is 121756525421. The next prime is 121756525481. The reversal of 121756525441 is 144525657121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74927565441 + 46828960000 = 273729^2 + 216400^2 .

It is a cyclic number.

It is not a de Polignac number, because 121756525441 - 2⁵ = 121756525409 is a prime.

It is not a weakly prime, because it can be changed into another prime (121756525421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60878262720 + 60878262721.

It is an arithmetic number, because the mean of its divisors is an integer number (60878262721).

Almost surely, 2^121756525441 is an apocalyptic number.

It is an amenable number.

121756525441 is a deficient number, since it is larger than the sum of its proper divisors (1).

121756525441 is an equidigital number, since it uses as much as digits as its factorization.

121756525441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 43.

The spelling of 121756525441 in words is "one hundred twenty-one billion, seven hundred fifty-six million, five hundred twenty-five thousand, four hundred forty-one".