21114405442253 has 4 divisors (see below), whose sum is σ = 21114662331360. Its totient is φ = 21114148553148.

The previous prime is 21114405442211. The next prime is 21114405442279. The reversal of 21114405442253 is 35224450441112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21114405442253 - 2⁶ = 21114405442189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114405442453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128321225 + ... + 128485662.

It is an arithmetic number, because the mean of its divisors is an integer number (5278665582840).

Almost surely, 2^{21114405442253} is an apocalyptic number.

It is an amenable number.

21114405442253 is a deficient number, since it is larger than the sum of its proper divisors (256889107).

21114405442253 is an equidigital number, since it uses as much as digits as its factorization.

21114405442253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256889106.

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 21114405442253 its reverse (35224450441112), we get a palindrome (56338855883365).

The spelling of 21114405442253 in words is "twenty-one trillion, one hundred fourteen billion, four hundred five million, four hundred forty-two thousand, two hundred fifty-three".