21199186532123 has 2 divisors, whose sum is σ = 21199186532124. Its totient is φ = 21199186532122.

The previous prime is 21199186532093. The next prime is 21199186532281. The reversal of 21199186532123 is 32123568199112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21199186532123 - 2⁸ = 21199186531867 is a prime.

It is not a weakly prime, because it can be changed into another prime (21199186552123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10599593266061 + 10599593266062.

It is an arithmetic number, because the mean of its divisors is an integer number (10599593266062).

Almost surely, 2^{21199186532123} is an apocalyptic number.

21199186532123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21199186532123 is an equidigital number, since it uses as much as digits as its factorization.

21199186532123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 53.

The spelling of 21199186532123 in words is "twenty-one trillion, one hundred ninety-nine billion, one hundred eighty-six million, five hundred thirty-two thousand, one hundred twenty-three".