21011120020259 has 2 divisors, whose sum is σ = 21011120020260. Its totient is φ = 21011120020258.

The previous prime is 21011120020201. The next prime is 21011120020273. The reversal of 21011120020259 is 95202002111012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21011120020259 is a prime.

It is not a weakly prime, because it can be changed into another prime (21011120029259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505560010129 + 10505560010130.

It is an arithmetic number, because the mean of its divisors is an integer number (10505560010130).

Almost surely, 2^{21011120020259} is an apocalyptic number.

21011120020259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011120020259 is an equidigital number, since it uses as much as digits as its factorization.

21011120020259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The spelling of 21011120020259 in words is "twenty-one trillion, eleven billion, one hundred twenty million, twenty thousand, two hundred fifty-nine".