21412423111253 has 2 divisors, whose sum is σ = 21412423111254. Its totient is φ = 21412423111252.

The previous prime is 21412423111231. The next prime is 21412423111259. The reversal of 21412423111253 is 35211132421412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20417899592689 + 994523518564 = 4518617^2 + 997258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21412423111253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21412423111259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706211555626 + 10706211555627.

It is an arithmetic number, because the mean of its divisors is an integer number (10706211555627).

Almost surely, 2^{21412423111253} is an apocalyptic number.

It is an amenable number.

21412423111253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21412423111253 is an equidigital number, since it uses as much as digits as its factorization.

21412423111253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

Adding to 21412423111253 its reverse (35211132421412), we get a palindrome (56623555532665).

The spelling of 21412423111253 in words is "twenty-one trillion, four hundred twelve billion, four hundred twenty-three million, one hundred eleven thousand, two hundred fifty-three".