21100022023 has 2 divisors, whose sum is σ = 21100022024. Its totient is φ = 21100022022.

The previous prime is 21100021993. The next prime is 21100022071. The reversal of 21100022023 is 32022000112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100022023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21100021994 and 21100022012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100022423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550011011 + 10550011012.

It is an arithmetic number, because the mean of its divisors is an integer number (10550011012).

Almost surely, 2^21100022023 is an apocalyptic number.

21100022023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100022023 is an equidigital number, since it uses as much as digits as its factorization.

21100022023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21100022023 its reverse (32022000112), we get a palindrome (53122022135).

The spelling of 21100022023 in words is "twenty-one billion, one hundred million, twenty-two thousand, twenty-three".