121261701551105 has 24 divisors (see below), whose sum is σ = 152735128253568. Its totient is φ = 92379241971648.

The previous prime is 121261701551099. The next prime is 121261701551149. The reversal of 121261701551105 is 501155107162121.

It is not a de Polignac number, because 121261701551105 - 2²⁸ = 121261433115649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 188139659 + ... + 188783088.

It is an arithmetic number, because the mean of its divisors is an integer number (6363963677232).

Almost surely, 2^{121261701551105} is an apocalyptic number.

It is an amenable number.

121261701551105 is a deficient number, since it is larger than the sum of its proper divisors (31473426702463).

121261701551105 is an equidigital number, since it uses as much as digits as its factorization.

121261701551105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376922873 (or 376922836 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 38.

The spelling of 121261701551105 in words is "one hundred twenty-one trillion, two hundred sixty-one billion, seven hundred one million, five hundred fifty-one thousand, one hundred five".