21000311159 has 2 divisors, whose sum is σ = 21000311160. Its totient is φ = 21000311158.

The previous prime is 21000311107. The next prime is 21000311197. The reversal of 21000311159 is 95111300012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000311159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000310159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500155579 + 10500155580.

It is an arithmetic number, because the mean of its divisors is an integer number (10500155580).

Almost surely, 2^21000311159 is an apocalyptic number.

21000311159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000311159 is an equidigital number, since it uses as much as digits as its factorization.

21000311159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 23.

The spelling of 21000311159 in words is "twenty-one billion, three hundred eleven thousand, one hundred fifty-nine".