21110123322031 has 4 divisors (see below), whose sum is σ = 21425199789592. Its totient is φ = 20795046854472.

The previous prime is 21110123322017. The next prime is 21110123322037. The reversal of 21110123322031 is 13022332101112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110123322031 is a prime.

It is a super-2 number, since 2×21110123322031² (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 = 21110123321993 and 21110123322011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110123322037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157538233680 + ... + 157538233813.

It is an arithmetic number, because the mean of its divisors is an integer number (5356299947398).

Almost surely, 2^{21110123322031} is an apocalyptic number.

21110123322031 is a deficient number, since it is larger than the sum of its proper divisors (315076467561).

21110123322031 is an equidigital number, since it uses as much as digits as its factorization.

21110123322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315076467560.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21110123322031 its reverse (13022332101112), we get a palindrome (34132455423143).

The spelling of 21110123322031 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-three million, three hundred twenty-two thousand, thirty-one".