121154152661 has 2 divisors, whose sum is σ = 121154152662. Its totient is φ = 121154152660.

The previous prime is 121154152649. The next prime is 121154152681. The reversal of 121154152661 is 166251451121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66693062500 + 54461090161 = 258250^2 + 233369^2 .

It is a cyclic number.

It is not a de Polignac number, because 121154152661 - 2⁶ = 121154152597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121154152621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60577076330 + 60577076331.

It is an arithmetic number, because the mean of its divisors is an integer number (60577076331).

Almost surely, 2^121154152661 is an apocalyptic number.

It is an amenable number.

121154152661 is a deficient number, since it is larger than the sum of its proper divisors (1).

121154152661 is an equidigital number, since it uses as much as digits as its factorization.

121154152661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 35.

The spelling of 121154152661 in words is "one hundred twenty-one billion, one hundred fifty-four million, one hundred fifty-two thousand, six hundred sixty-one".