121550365441 has 2 divisors, whose sum is σ = 121550365442. Its totient is φ = 121550365440.

The previous prime is 121550365429. The next prime is 121550365451. The reversal of 121550365441 is 144563055121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100946633841 + 20603731600 = 317721^2 + 143540^2 .

It is a cyclic number.

It is not a de Polignac number, because 121550365441 - 2¹⁷ = 121550234369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121550365441.

It is not a weakly prime, because it can be changed into another prime (121550365411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60775182720 + 60775182721.

It is an arithmetic number, because the mean of its divisors is an integer number (60775182721).

Almost surely, 2^121550365441 is an apocalyptic number.

It is an amenable number.

121550365441 is a deficient number, since it is larger than the sum of its proper divisors (1).

121550365441 is an equidigital number, since it uses as much as digits as its factorization.

121550365441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 121550365441 in words is "one hundred twenty-one billion, five hundred fifty million, three hundred sixty-five thousand, four hundred forty-one".