21100201090019 has 2 divisors, whose sum is σ = 21100201090020. Its totient is φ = 21100201090018.

The previous prime is 21100201089973. The next prime is 21100201090049. The reversal of 21100201090019 is 91009010200112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100201090019 is a prime.

It is a super-2 number, since 2×21100201090019² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100201090019.

It is not a weakly prime, because it can be changed into another prime (21100201090049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550100545009 + 10550100545010.

It is an arithmetic number, because the mean of its divisors is an integer number (10550100545010).

Almost surely, 2^{21100201090019} is an apocalyptic number.

21100201090019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100201090019 is an equidigital number, since it uses as much as digits as its factorization.

21100201090019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 21100201090019 in words is "twenty-one trillion, one hundred billion, two hundred one million, ninety thousand, nineteen".