21110120020999 has 2 divisors, whose sum is σ = 21110120021000. Its totient is φ = 21110120020998.

The previous prime is 21110120020933. The next prime is 21110120021009. The reversal of 21110120020999 is 99902002101112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110120020999 - 2²³ = 21110111632391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110120023999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555060010499 + 10555060010500.

It is an arithmetic number, because the mean of its divisors is an integer number (10555060010500).

Almost surely, 2^{21110120020999} is an apocalyptic number.

21110120020999 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110120020999 is an equidigital number, since it uses as much as digits as its factorization.

21110120020999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 21110120020999 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty million, twenty thousand, nine hundred ninety-nine".