121742762437 has 2 divisors, whose sum is σ = 121742762438. Its totient is φ = 121742762436.

The previous prime is 121742762431. The next prime is 121742762441. The reversal of 121742762437 is 734267247121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106484089761 + 15258672676 = 326319^2 + 123526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121742762437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121742762431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60871381218 + 60871381219.

It is an arithmetic number, because the mean of its divisors is an integer number (60871381219).

Almost surely, 2^121742762437 is an apocalyptic number.

It is an amenable number.

121742762437 is a deficient number, since it is larger than the sum of its proper divisors (1).

121742762437 is an equidigital number, since it uses as much as digits as its factorization.

121742762437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 46.

The spelling of 121742762437 in words is "one hundred twenty-one billion, seven hundred forty-two million, seven hundred sixty-two thousand, four hundred thirty-seven".