121012331231 has 6 divisors (see below), whose sum is σ = 133013554296. Its totient is φ = 110011210100.

The previous prime is 121012331189. The next prime is 121012331263. The reversal of 121012331231 is 132133210121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-121012331231 is a prime.

It is a super-2 number, since 2×121012331231² (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 (121012331281) 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, 500050835 + ... + 500051076.

It is an arithmetic number, because the mean of its divisors is an integer number (22168925716).

Almost surely, 2^121012331231 is an apocalyptic number.

121012331231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121012331231 is a deficient number, since it is larger than the sum of its proper divisors (12001223065).

121012331231 is a wasteful number, since it uses less digits than its factorization.

121012331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000101933 (or 1000101922 counting only the distinct ones).

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

Adding to 121012331231 its reverse (132133210121), we get a palindrome (253145541352).

The spelling of 121012331231 in words is "one hundred twenty-one billion, twelve million, three hundred thirty-one thousand, two hundred thirty-one".