121323242987 has 16 divisors (see below), whose sum is σ = 127304304000. Its totient is φ = 115466891904.

The previous prime is 121323242983. The next prime is 121323242993. The reversal of 121323242987 is 789242323121.

It is a cyclic number.

It is not a de Polignac number, because 121323242987 - 2² = 121323242983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121323242983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1361189 + ... + 1447577.

It is an arithmetic number, because the mean of its divisors is an integer number (7956519000).

Almost surely, 2^121323242987 is an apocalyptic number.

121323242987 is a deficient number, since it is larger than the sum of its proper divisors (5981061013).

121323242987 is an equidigital number, since it uses as much as digits as its factorization.

121323242987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87110.

The product of its digits is 290304, while the sum is 44.

The spelling of 121323242987 in words is "one hundred twenty-one billion, three hundred twenty-three million, two hundred forty-two thousand, nine hundred eighty-seven".