121890560153 has 2 divisors, whose sum is σ = 121890560154. Its totient is φ = 121890560152.

The previous prime is 121890560149. The next prime is 121890560159. The reversal of 121890560153 is 351065098121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84968169049 + 36922391104 = 291493^2 + 192152^2 .

It is a cyclic number.

It is not a de Polignac number, because 121890560153 - 2² = 121890560149 is a prime.

It is a super-2 number, since 2×121890560153² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121890560153.

It is not a weakly prime, because it can be changed into another prime (121890560159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60945280076 + 60945280077.

It is an arithmetic number, because the mean of its divisors is an integer number (60945280077).

Almost surely, 2^121890560153 is an apocalyptic number.

It is an amenable number.

121890560153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121890560153 is an equidigital number, since it uses as much as digits as its factorization.

121890560153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 121890560153 in words is "one hundred twenty-one billion, eight hundred ninety million, five hundred sixty thousand, one hundred fifty-three".