21112123102331 has 8 divisors (see below), whose sum is σ = 21510701689104. Its totient is φ = 20713553280160.

The previous prime is 21112123102327. The next prime is 21112123102349. The reversal of 21112123102331 is 13320132121112.

It is a happy number.

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 21112123102331 - 2² = 21112123102327 is a prime.

It is a super-2 number, since 2×21112123102331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112123102297 and 21112123102306.

It is not an unprimeable number, because it can be changed into a prime (21112123102321) 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, 2777261 + ... + 7066641.

It is an arithmetic number, because the mean of its divisors is an integer number (2688837711138).

Almost surely, 2^{21112123102331} is an apocalyptic number.

21112123102331 is a deficient number, since it is larger than the sum of its proper divisors (398578586773).

21112123102331 is an equidigital number, since it uses as much as digits as its factorization.

21112123102331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382301.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21112123102331 its reverse (13320132121112), we get a palindrome (34432255223443).

The spelling of 21112123102331 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-three million, one hundred two thousand, three hundred thirty-one".