21023312119 has 2 divisors, whose sum is σ = 21023312120. Its totient is φ = 21023312118.

The previous prime is 21023312117. The next prime is 21023312131. The reversal of 21023312119 is 91121332012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21023312119 - 2¹ = 21023312117 is a prime.

It is a super-2 number, since 2×21023312119² (a number of 21 digits) contains 22 as substring.

Together with 21023312117, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21023312093 and 21023312102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21023312117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511656059 + 10511656060.

It is an arithmetic number, because the mean of its divisors is an integer number (10511656060).

Almost surely, 2^21023312119 is an apocalyptic number.

21023312119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023312119 is an equidigital number, since it uses as much as digits as its factorization.

21023312119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 21023312119 in words is "twenty-one billion, twenty-three million, three hundred twelve thousand, one hundred nineteen".