123402100219 has 2 divisors, whose sum is σ = 123402100220. Its totient is φ = 123402100218.

The previous prime is 123402100193. The next prime is 123402100253. The reversal of 123402100219 is 912001204321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123402100219 - 2⁵ = 123402100187 is a prime.

It is a super-2 number, since 2×123402100219² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123402100193 and 123402100202.

It is not a weakly prime, because it can be changed into another prime (123402100279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61701050109 + 61701050110.

It is an arithmetic number, because the mean of its divisors is an integer number (61701050110).

Almost surely, 2^123402100219 is an apocalyptic number.

123402100219 is a deficient number, since it is larger than the sum of its proper divisors (1).

123402100219 is an equidigital number, since it uses as much as digits as its factorization.

123402100219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 123402100219 in words is "one hundred twenty-three billion, four hundred two million, one hundred thousand, two hundred nineteen".