21020221210259 has 2 divisors, whose sum is σ = 21020221210260. Its totient is φ = 21020221210258.

The previous prime is 21020221210207. The next prime is 21020221210271. The reversal of 21020221210259 is 95201212202012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21020221210259 - 2²⁰ = 21020220161683 is a prime.

It is a super-3 number, since 3×21020221210259³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21020221210759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510110605129 + 10510110605130.

It is an arithmetic number, because the mean of its divisors is an integer number (10510110605130).

Almost surely, 2^{21020221210259} is an apocalyptic number.

21020221210259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020221210259 is an equidigital number, since it uses as much as digits as its factorization.

21020221210259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 21020221210259 in words is "twenty-one trillion, twenty billion, two hundred twenty-one million, two hundred ten thousand, two hundred fifty-nine".