21201022022123 has 2 divisors, whose sum is σ = 21201022022124. Its totient is φ = 21201022022122.

The previous prime is 21201022022017. The next prime is 21201022022149. The reversal of 21201022022123 is 32122022010212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201022022123 - 2²² = 21201017827819 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201022022095 and 21201022022104.

It is not a weakly prime, because it can be changed into another prime (21201022022423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600511011061 + 10600511011062.

It is an arithmetic number, because the mean of its divisors is an integer number (10600511011062).

Almost surely, 2^{21201022022123} is an apocalyptic number.

21201022022123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201022022123 is an equidigital number, since it uses as much as digits as its factorization.

21201022022123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21201022022123 its reverse (32122022010212), we get a palindrome (53323044032335).

The spelling of 21201022022123 in words is "twenty-one trillion, two hundred one billion, twenty-two million, twenty-two thousand, one hundred twenty-three".