21201013019 has 2 divisors, whose sum is σ = 21201013020. Its totient is φ = 21201013018.

The previous prime is 21201012997. The next prime is 21201013027. The reversal of 21201013019 is 91031010212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201013019 - 2²⁸ = 20932577563 is a prime.

It is a super-2 number, since 2×21201013019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21201013049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600506509 + 10600506510.

It is an arithmetic number, because the mean of its divisors is an integer number (10600506510).

Almost surely, 2^21201013019 is an apocalyptic number.

21201013019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201013019 is an equidigital number, since it uses as much as digits as its factorization.

21201013019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 21201013019 in words is "twenty-one billion, two hundred one million, thirteen thousand, nineteen".