121312813105 has 32 divisors (see below), whose sum is σ = 166120139520. Its totient is φ = 84184826880.

The previous prime is 121312813103. The next prime is 121312813129. The reversal of 121312813105 is 501318213121.

It is not a de Polignac number, because 121312813105 - 2¹ = 121312813103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121312813103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400149 + ... + 634621.

It is an arithmetic number, because the mean of its divisors is an integer number (5191254360).

Almost surely, 2^121312813105 is an apocalyptic number.

It is an amenable number.

121312813105 is a deficient number, since it is larger than the sum of its proper divisors (44807326415).

121312813105 is a wasteful number, since it uses less digits than its factorization.

121312813105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234921.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 121312813105 in words is "one hundred twenty-one billion, three hundred twelve million, eight hundred thirteen thousand, one hundred five".