121201123131 has 12 divisors (see below), whose sum is σ = 190983588120. Its totient is φ = 73455226080.

The previous prime is 121201123097. The next prime is 121201123159. The reversal of 121201123131 is 131321102121.

It is not a de Polignac number, because 121201123131 - 2⁷ = 121201123003 is a prime.

It is a super-2 number, since 2×121201123131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121201124131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612126786 + ... + 612126983.

It is an arithmetic number, because the mean of its divisors is an integer number (15915299010).

Almost surely, 2^121201123131 is an apocalyptic number.

121201123131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121201123131 is a deficient number, since it is larger than the sum of its proper divisors (69782464989).

121201123131 is a wasteful number, since it uses less digits than its factorization.

121201123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224253786 (or 1224253783 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121201123131 its reverse (131321102121), we get a palindrome (252522225252).

The spelling of 121201123131 in words is "one hundred twenty-one billion, two hundred one million, one hundred twenty-three thousand, one hundred thirty-one".