121562898449 has 2 divisors, whose sum is σ = 121562898450. Its totient is φ = 121562898448.

The previous prime is 121562898421. The next prime is 121562898487. The reversal of 121562898449 is 944898265121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88363507600 + 33199390849 = 297260^2 + 182207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121562898449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121562898419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60781449224 + 60781449225.

It is an arithmetic number, because the mean of its divisors is an integer number (60781449225).

Almost surely, 2^121562898449 is an apocalyptic number.

It is an amenable number.

121562898449 is a deficient number, since it is larger than the sum of its proper divisors (1).

121562898449 is an equidigital number, since it uses as much as digits as its factorization.

121562898449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 59.

The spelling of 121562898449 in words is "one hundred twenty-one billion, five hundred sixty-two million, eight hundred ninety-eight thousand, four hundred forty-nine".