121310103019987 has 48 divisors (see below), whose sum is σ = 146317387087872. Its totient is φ = 100178270519040.

The previous prime is 121310103019969. The next prime is 121310103020033. The reversal of 121310103019987 is 789910301013121.

It is a happy number.

It is not a de Polignac number, because 121310103019987 - 2²⁷ = 121309968802259 is a prime.

It is a super-2 number, since 2×121310103019987² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121310103019907) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 306961038 + ... + 307355980.

It is an arithmetic number, because the mean of its divisors is an integer number (3048278897664).

Almost surely, 2^{121310103019987} is an apocalyptic number.

121310103019987 is a deficient number, since it is larger than the sum of its proper divisors (25007284067885).

121310103019987 is a wasteful number, since it uses less digits than its factorization.

121310103019987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395888 (or 395881 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 46.

The spelling of 121310103019987 in words is "one hundred twenty-one trillion, three hundred ten billion, one hundred three million, nineteen thousand, nine hundred eighty-seven".