121687252501 has 2 divisors, whose sum is σ = 121687252502. Its totient is φ = 121687252500.

The previous prime is 121687252481. The next prime is 121687252571. The reversal of 121687252501 is 105252786121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88134171876 + 33553080625 = 296874^2 + 183175^2 .

It is a cyclic number.

It is not a de Polignac number, because 121687252501 - 2²⁹ = 121150381589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121687252571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60843626250 + 60843626251.

It is an arithmetic number, because the mean of its divisors is an integer number (60843626251).

Almost surely, 2^121687252501 is an apocalyptic number.

It is an amenable number.

121687252501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121687252501 is an equidigital number, since it uses as much as digits as its factorization.

121687252501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 121687252501 in words is "one hundred twenty-one billion, six hundred eighty-seven million, two hundred fifty-two thousand, five hundred one".