121132131231 has 4 divisors (see below), whose sum is σ = 161509508312. Its totient is φ = 80754754152.

The previous prime is 121132131229. The next prime is 121132131271. The reversal of 121132131231 is 132131231121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121132131231 - 2¹ = 121132131229 is a prime.

It is a super-2 number, since 2×121132131231² (a number of 23 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 = 121132131198 and 121132131207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121132131221) 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, 20188688536 + ... + 20188688541.

It is an arithmetic number, because the mean of its divisors is an integer number (40377377078).

Almost surely, 2^121132131231 is an apocalyptic number.

121132131231 is a deficient number, since it is larger than the sum of its proper divisors (40377377081).

121132131231 is an equidigital number, since it uses as much as digits as its factorization.

121132131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40377377080.

The product of its digits is 216, while the sum is 21.

Adding to 121132131231 its reverse (132131231121), we get a palindrome (253263362352).

It can be divided in two parts, 121 and 132131231, that multiplied together give a palindrome (15987878951).

The spelling of 121132131231 in words is "one hundred twenty-one billion, one hundred thirty-two million, one hundred thirty-one thousand, two hundred thirty-one".