121123231 has 16 divisors (see below), whose sum is σ = 128176128. Its totient is φ = 114307200.

The previous prime is 121123229. The next prime is 121123241. The reversal of 121123231 is 132321121.

It is a cyclic number.

It is not a de Polignac number, because 121123231 - 2¹ = 121123229 is a prime.

It is a super-2 number, since 2×121123231² = 29341674175758722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248470 + ... + 248956.

It is an arithmetic number, because the mean of its divisors is an integer number (8011008).

Almost surely, 2^121123231 is an apocalyptic number.

121123231 is a deficient number, since it is larger than the sum of its proper divisors (7052897).

121123231 is a wasteful number, since it uses less digits than its factorization.

121123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702.

The product of its digits is 72, while the sum is 16.

The square root of 121123231 is about 11005.5999836447. The cubic root of 121123231 is about 494.7765968048.

Adding to 121123231 its reverse (132321121), we get a palindrome (253444352).

It can be divided in two parts, 1211 and 23231, that added together give a palindrome (24442).

The spelling of 121123231 in words is "one hundred twenty-one million, one hundred twenty-three thousand, two hundred thirty-one".