20121112331 has 8 divisors (see below), whose sum is σ = 21757999680. Its totient is φ = 18534590848.

The previous prime is 20121112327. The next prime is 20121112343. The reversal of 20121112331 is 13321112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121112331 - 2² = 20121112327 is a prime.

It is a super-2 number, since 2×20121112331² (a number of 21 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 not an unprimeable number, because it can be changed into a prime (20121112381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12590636 + ... + 12592233.

It is an arithmetic number, because the mean of its divisors is an integer number (2719749960).

Almost surely, 2^20121112331 is an apocalyptic number.

20121112331 is a deficient number, since it is larger than the sum of its proper divisors (1636887349).

20121112331 is a wasteful number, since it uses less digits than its factorization.

20121112331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25182933.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20121112331 its reverse (13321112102), we get a palindrome (33442224433).

The spelling of 20121112331 in words is "twenty billion, one hundred twenty-one million, one hundred twelve thousand, three hundred thirty-one".