121113312131 has 16 divisors (see below), whose sum is σ = 145715055360. Its totient is φ = 98337641760.

The previous prime is 121113312121. The next prime is 121113312139. The reversal of 121113312131 is 131213311121.

It is a cyclic number.

It is not a de Polignac number, because 121113312131 - 2¹⁸ = 121113049987 is a prime.

It is a super-2 number, since 2×121113312131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121113312139) 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, 1444985 + ... + 1526501.

It is an arithmetic number, because the mean of its divisors is an integer number (9107190960).

Almost surely, 2^121113312131 is an apocalyptic number.

121113312131 is a deficient number, since it is larger than the sum of its proper divisors (24601743229).

121113312131 is a wasteful number, since it uses less digits than its factorization.

121113312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92714.

The product of its digits is 108, while the sum is 20.

Adding to 121113312131 its reverse (131213311121), we get a palindrome (252326623252).

The spelling of 121113312131 in words is "one hundred twenty-one billion, one hundred thirteen million, three hundred twelve thousand, one hundred thirty-one".