121031112131 has 4 divisors (see below), whose sum is σ = 121032084000. Its totient is φ = 121030140264.

The previous prime is 121031112091. The next prime is 121031112133. The reversal of 121031112131 is 131211130121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 131211130121 = 659 ⋅199106419.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121031112131 is a prime.

It is a super-2 number, since 2×121031112131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121031112133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265931 + ... + 559268.

It is an arithmetic number, because the mean of its divisors is an integer number (30258021000).

Almost surely, 2^121031112131 is an apocalyptic number.

121031112131 is a deficient number, since it is larger than the sum of its proper divisors (971869).

121031112131 is an equidigital number, since it uses as much as digits as its factorization.

121031112131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971868.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 121031112131 its reverse (131211130121), we get a palindrome (252242242252).

The spelling of 121031112131 in words is "one hundred twenty-one billion, thirty-one million, one hundred twelve thousand, one hundred thirty-one".