21122031023 has 8 divisors (see below), whose sum is σ = 21153523776. Its totient is φ = 21090564000.

The previous prime is 21122031001. The next prime is 21122031031. The reversal of 21122031023 is 32013022112.

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 21122031023 - 2²⁰ = 21120982447 is a prime.

It is a super-2 number, since 2×21122031023² (a number of 21 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 = 21122030992 and 21122031010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122031083) 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, 2128373 + ... + 2138273.

It is an arithmetic number, because the mean of its divisors is an integer number (2644190472).

Almost surely, 2^21122031023 is an apocalyptic number.

21122031023 is a deficient number, since it is larger than the sum of its proper divisors (31492753).

21122031023 is a wasteful number, since it uses less digits than its factorization.

21122031023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12865.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21122031023 its reverse (32013022112), we get a palindrome (53135053135).

The spelling of 21122031023 in words is "twenty-one billion, one hundred twenty-two million, thirty-one thousand, twenty-three".