21201588019 has 2 divisors, whose sum is σ = 21201588020. Its totient is φ = 21201588018.

The previous prime is 21201587993. The next prime is 21201588043. The reversal of 21201588019 is 91088510212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201588019 - 2⁵ = 21201587987 is a prime.

It is a super-2 number, since 2×21201588019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21201588119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600794009 + 10600794010.

It is an arithmetic number, because the mean of its divisors is an integer number (10600794010).

Almost surely, 2^21201588019 is an apocalyptic number.

21201588019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201588019 is an equidigital number, since it uses as much as digits as its factorization.

21201588019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 37.

The spelling of 21201588019 in words is "twenty-one billion, two hundred one million, five hundred eighty-eight thousand, nineteen".