21112021010999 has 2 divisors, whose sum is σ = 21112021011000. Its totient is φ = 21112021010998.

The previous prime is 21112021010939. The next prime is 21112021011043. The reversal of 21112021010999 is 99901012021112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112021010999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112021010939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556010505499 + 10556010505500.

It is an arithmetic number, because the mean of its divisors is an integer number (10556010505500).

Almost surely, 2^{21112021010999} is an apocalyptic number.

21112021010999 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112021010999 is an equidigital number, since it uses as much as digits as its factorization.

21112021010999 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 38.

The spelling of 21112021010999 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, ten thousand, nine hundred ninety-nine".