21123030119 has 2 divisors, whose sum is σ = 21123030120. Its totient is φ = 21123030118.

The previous prime is 21123030079. The next prime is 21123030133. The reversal of 21123030119 is 91103032112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21123030119 is a prime.

It is a super-2 number, since 2×21123030119² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21123030094 and 21123030103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21123038119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561515059 + 10561515060.

It is an arithmetic number, because the mean of its divisors is an integer number (10561515060).

Almost surely, 2^21123030119 is an apocalyptic number.

21123030119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21123030119 is an equidigital number, since it uses as much as digits as its factorization.

21123030119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 21123030119 in words is "twenty-one billion, one hundred twenty-three million, thirty thousand, one hundred nineteen".