121112021231 has 16 divisors (see below), whose sum is σ = 130757934528. Its totient is φ = 111758323200.

The previous prime is 121112021213. The next prime is 121112021269. The reversal of 121112021231 is 132120211121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121112021231 - 2⁶ = 121112021167 is a prime.

It is a super-2 number, since 2×121112021231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112021291) 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, 134741 + ... + 510273.

It is an arithmetic number, because the mean of its divisors is an integer number (8172370908).

Almost surely, 2^121112021231 is an apocalyptic number.

121112021231 is a deficient number, since it is larger than the sum of its proper divisors (9645913297).

121112021231 is a wasteful number, since it uses less digits than its factorization.

121112021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375922.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121112021231 its reverse (132120211121), we get a palindrome (253232232352).

The spelling of 121112021231 in words is "one hundred twenty-one billion, one hundred twelve million, twenty-one thousand, two hundred thirty-one".