121261316475075 has 96 divisors (see below), whose sum is σ = 233838871211520. Its totient is φ = 54300256281600.

The previous prime is 121261316475071. The next prime is 121261316475107. The reversal of 121261316475075 is 570574613162121.

It is not a de Polignac number, because 121261316475075 - 2² = 121261316475071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121261316475071) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1738117 + ... + 15669833.

It is an arithmetic number, because the mean of its divisors is an integer number (2435821575120).

Almost surely, 2^{121261316475075} is an apocalyptic number.

121261316475075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121261316475075 is a deficient number, since it is larger than the sum of its proper divisors (112577554736445).

121261316475075 is a wasteful number, since it uses less digits than its factorization.

121261316475075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13932077 (or 13932072 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 121261316475075 in words is "one hundred twenty-one trillion, two hundred sixty-one billion, three hundred sixteen million, four hundred seventy-five thousand, seventy-five".