21111101022899 has 2 divisors, whose sum is σ = 21111101022900. Its totient is φ = 21111101022898.

The previous prime is 21111101022887. The next prime is 21111101022923. The reversal of 21111101022899 is 99822010111112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21111101022899 is a prime.

It is not a weakly prime, because it can be changed into another prime (21111101022829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555550511449 + 10555550511450.

It is an arithmetic number, because the mean of its divisors is an integer number (10555550511450).

Almost surely, 2^{21111101022899} is an apocalyptic number.

21111101022899 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111101022899 is an equidigital number, since it uses as much as digits as its factorization.

21111101022899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 38.

The spelling of 21111101022899 in words is "twenty-one trillion, one hundred eleven billion, one hundred one million, twenty-two thousand, eight hundred ninety-nine".