21411011399 has 2 divisors, whose sum is σ = 21411011400. Its totient is φ = 21411011398.

The previous prime is 21411011393. The next prime is 21411011417. The reversal of 21411011399 is 99311011412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21411011399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21411011393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705505699 + 10705505700.

It is an arithmetic number, because the mean of its divisors is an integer number (10705505700).

Almost surely, 2^21411011399 is an apocalyptic number.

21411011399 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411011399 is an equidigital number, since it uses as much as digits as its factorization.

21411011399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 21411011399 in words is "twenty-one billion, four hundred eleven million, eleven thousand, three hundred ninety-nine".