121541015429 has 2 divisors, whose sum is σ = 121541015430. Its totient is φ = 121541015428.

The previous prime is 121541015419. The next prime is 121541015447. The reversal of 121541015429 is 924510145121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120358343329 + 1182672100 = 346927^2 + 34390^2 .

It is a cyclic number.

It is not a de Polignac number, because 121541015429 - 2⁸ = 121541015173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121541015419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60770507714 + 60770507715.

It is an arithmetic number, because the mean of its divisors is an integer number (60770507715).

Almost surely, 2^121541015429 is an apocalyptic number.

It is an amenable number.

121541015429 is a deficient number, since it is larger than the sum of its proper divisors (1).

121541015429 is an equidigital number, since it uses as much as digits as its factorization.

121541015429 is an evil number, because the sum of its binary digits is even.

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

The spelling of 121541015429 in words is "one hundred twenty-one billion, five hundred forty-one million, fifteen thousand, four hundred twenty-nine".