121457909401 has 2 divisors, whose sum is σ = 121457909402. Its totient is φ = 121457909400.

The previous prime is 121457909381. The next prime is 121457909471. The reversal of 121457909401 is 104909754121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100710387801 + 20747521600 = 317349^2 + 144040^2 .

It is a cyclic number.

It is not a de Polignac number, because 121457909401 - 2⁵ = 121457909369 is a prime.

It is not a weakly prime, because it can be changed into another prime (121457909471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60728954700 + 60728954701.

It is an arithmetic number, because the mean of its divisors is an integer number (60728954701).

Almost surely, 2^121457909401 is an apocalyptic number.

It is an amenable number.

121457909401 is a deficient number, since it is larger than the sum of its proper divisors (1).

121457909401 is an equidigital number, since it uses as much as digits as its factorization.

121457909401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 121457909401 in words is "one hundred twenty-one billion, four hundred fifty-seven million, nine hundred nine thousand, four hundred one".