121651210493 has 2 divisors, whose sum is σ = 121651210494. Its totient is φ = 121651210492.

The previous prime is 121651210489. The next prime is 121651210579. The reversal of 121651210493 is 394012156121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99485360569 + 22165849924 = 315413^2 + 148882^2 .

It is a cyclic number.

It is not a de Polignac number, because 121651210493 - 2² = 121651210489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121651210433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60825605246 + 60825605247.

It is an arithmetic number, because the mean of its divisors is an integer number (60825605247).

Almost surely, 2^121651210493 is an apocalyptic number.

It is an amenable number.

121651210493 is a deficient number, since it is larger than the sum of its proper divisors (1).

121651210493 is an equidigital number, since it uses as much as digits as its factorization.

121651210493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 121651210493 in words is "one hundred twenty-one billion, six hundred fifty-one million, two hundred ten thousand, four hundred ninety-three".