21011101259 has 2 divisors, whose sum is σ = 21011101260. Its totient is φ = 21011101258.

The previous prime is 21011101231. The next prime is 21011101277. The reversal of 21011101259 is 95210111012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21011101259 - 2¹⁶ = 21011035723 is a prime.

It is a super-2 number, since 2×21011101259² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21011100259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505550629 + 10505550630.

It is an arithmetic number, because the mean of its divisors is an integer number (10505550630).

Almost surely, 2^21011101259 is an apocalyptic number.

21011101259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011101259 is an equidigital number, since it uses as much as digits as its factorization.

21011101259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 23.

The spelling of 21011101259 in words is "twenty-one billion, eleven million, one hundred one thousand, two hundred fifty-nine".