21522014123 has 2 divisors, whose sum is σ = 21522014124. Its totient is φ = 21522014122.

The previous prime is 21522014119. The next prime is 21522014141. The reversal of 21522014123 is 32141022512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21522014123 - 2² = 21522014119 is a prime.

It is a super-2 number, since 2×21522014123² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21522017123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10761007061 + 10761007062.

It is an arithmetic number, because the mean of its divisors is an integer number (10761007062).

Almost surely, 2^21522014123 is an apocalyptic number.

21522014123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21522014123 is an equidigital number, since it uses as much as digits as its factorization.

21522014123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21522014123 its reverse (32141022512), we get a palindrome (53663036635).

The spelling of 21522014123 in words is "twenty-one billion, five hundred twenty-two million, fourteen thousand, one hundred twenty-three".