121123233131 has 4 divisors (see below), whose sum is σ = 122255226072. Its totient is φ = 119991240192.

The previous prime is 121123233109. The next prime is 121123233221. The reversal of 121123233131 is 131332321121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121123233131 is a prime.

It is a super-2 number, since 2×121123233131² (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 = 121123233097 and 121123233106.

It is not an unprimeable number, because it can be changed into a prime (121123233331) 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, 565996310 + ... + 565996523.

It is an arithmetic number, because the mean of its divisors is an integer number (30563806518).

Almost surely, 2^121123233131 is an apocalyptic number.

121123233131 is a deficient number, since it is larger than the sum of its proper divisors (1131992941).

121123233131 is a wasteful number, since it uses less digits than its factorization.

121123233131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131992940.

The product of its digits is 648, while the sum is 23.

Adding to 121123233131 its reverse (131332321121), we get a palindrome (252455554252).

The spelling of 121123233131 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred thirty-three thousand, one hundred thirty-one".