121011331131 has 64 divisors (see below), whose sum is σ = 185712445440. Its totient is φ = 78803826912.

The previous prime is 121011331127. The next prime is 121011331141. The reversal of 121011331131 is 131133110121.

121011331131 is a `hidden beast` number, since 1 + 210 + 113 + 311 + 31 = 666.

It is not a de Polignac number, because 121011331131 - 2² = 121011331127 is a prime.

It is a super-2 number, since 2×121011331131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121011331141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79455136 + ... + 79456658.

It is an arithmetic number, because the mean of its divisors is an integer number (2901756960).

Almost surely, 2^121011331131 is an apocalyptic number.

121011331131 is a deficient number, since it is larger than the sum of its proper divisors (64701114309).

121011331131 is an frugal number, since it uses more digits than its factorization.

121011331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364 (or 2346 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 121011331131 its reverse (131133110121), we get a palindrome (252144441252).

The spelling of 121011331131 in words is "one hundred twenty-one billion, eleven million, three hundred thirty-one thousand, one hundred thirty-one".