21101030223253 has 2 divisors, whose sum is σ = 21101030223254. Its totient is φ = 21101030223252.

The previous prime is 21101030223223. The next prime is 21101030223289. The reversal of 21101030223253 is 35232203010112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20681739007524 + 419291215729 = 4547718^2 + 647527^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101030223253 - 2²⁵ = 21100996668821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101030223223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550515111626 + 10550515111627.

It is an arithmetic number, because the mean of its divisors is an integer number (10550515111627).

Almost surely, 2^{21101030223253} is an apocalyptic number.

It is an amenable number.

21101030223253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101030223253 is an equidigital number, since it uses as much as digits as its factorization.

21101030223253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21101030223253 its reverse (35232203010112), we get a palindrome (56333233233365).

The spelling of 21101030223253 in words is "twenty-one trillion, one hundred one billion, thirty million, two hundred twenty-three thousand, two hundred fifty-three".