121103123231 has 6 divisors (see below), whose sum is σ = 123190511832. Its totient is φ = 119050524500.

The previous prime is 121103123147. The next prime is 121103123291. The reversal of 121103123231 is 132321301121.

It is a happy number.

It is not a de Polignac number, because 121103123231 - 2²² = 121098928927 is a prime.

It is a super-2 number, since 2×121103123231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121103123291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17391395 + ... + 17398356.

It is an arithmetic number, because the mean of its divisors is an integer number (20531751972).

Almost surely, 2^121103123231 is an apocalyptic number.

121103123231 is a deficient number, since it is larger than the sum of its proper divisors (2087388601).

121103123231 is an frugal number, since it uses more digits than its factorization.

121103123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34789869 (or 34789810 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121103123231 its reverse (132321301121), we get a palindrome (253424424352).

The spelling of 121103123231 in words is "one hundred twenty-one billion, one hundred three million, one hundred twenty-three thousand, two hundred thirty-one".