121320211131 has 64 divisors (see below), whose sum is σ = 208864051200. Its totient is φ = 68169765888.

The previous prime is 121320211127. The next prime is 121320211141. The reversal of 121320211131 is 131112023121.

121320211131 is a `hidden beast` number, since 1 + 2 + 1 + 320 + 211 + 131 = 666.

It is not a de Polignac number, because 121320211131 - 2² = 121320211127 is a prime.

It is a super-2 number, since 2×121320211131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121320211141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2689975 + ... + 2734703.

It is an arithmetic number, because the mean of its divisors is an integer number (3263500800).

Almost surely, 2^121320211131 is an apocalyptic number.

121320211131 is a deficient number, since it is larger than the sum of its proper divisors (87543840069).

121320211131 is a wasteful number, since it uses less digits than its factorization.

121320211131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44985 (or 44979 counting only the distinct ones).

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

Adding to 121320211131 its reverse (131112023121), we get a palindrome (252432234252).

The spelling of 121320211131 in words is "one hundred twenty-one billion, three hundred twenty million, two hundred eleven thousand, one hundred thirty-one".