121221131323131 has 12 divisors (see below), whose sum is σ = 200111073930352. Its totient is φ = 69269217898896.

The previous prime is 121221131323091. The next prime is 121221131323183. The reversal of 121221131323131 is 131323131122121.

121221131323131 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 211 + 3 + 132 + 313 + 1 = 666.

It is not a de Polignac number, because 121221131323131 - 2⁹ = 121221131322619 is a prime.

It is a super-2 number, since 2×121221131323131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121221131323095 and 121221131323104.

It is not an unprimeable number, because it can be changed into a prime (121221131373131) 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, 962072470756 + ... + 962072470881.

Almost surely, 2^{121221131323131} is an apocalyptic number.

121221131323131 is a deficient number, since it is larger than the sum of its proper divisors (78889942607221).

121221131323131 is a wasteful number, since it uses less digits than its factorization.

121221131323131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924144941650 (or 1924144941647 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

Adding to 121221131323131 its reverse (131323131122121), we get a palindrome (252544262445252).

The spelling of 121221131323131 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred thirty-one million, three hundred twenty-three thousand, one hundred thirty-one".