21112122023 has 16 divisors (see below), whose sum is σ = 22666164480. Its totient is φ = 19605737664.

The previous prime is 21112121999. The next prime is 21112122079. The reversal of 21112122023 is 32022121112.

It is a cyclic number.

It is not a de Polignac number, because 21112122023 - 2¹² = 21112117927 is a prime.

It is a super-2 number, since 2×21112122023² (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 = 21112121992 and 21112122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112122523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179390 + ... + 272772.

It is an arithmetic number, because the mean of its divisors is an integer number (1416635280).

Almost surely, 2^21112122023 is an apocalyptic number.

21112122023 is a deficient number, since it is larger than the sum of its proper divisors (1554042457).

21112122023 is a wasteful number, since it uses less digits than its factorization.

21112122023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93638.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21112122023 its reverse (32022121112), we get a palindrome (53134243135).

The spelling of 21112122023 in words is "twenty-one billion, one hundred twelve million, one hundred twenty-two thousand, twenty-three".