21214026552253 has 2 divisors, whose sum is σ = 21214026552254. Its totient is φ = 21214026552252.

The previous prime is 21214026552233. The next prime is 21214026552289. The reversal of 21214026552253 is 35225562041212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21189247699684 + 24778852569 = 4603178^2 + 157413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21214026552253 is a prime.

It is a super-2 number, since 2×21214026552253² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214026552233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607013276126 + 10607013276127.

It is an arithmetic number, because the mean of its divisors is an integer number (10607013276127).

Almost surely, 2^{21214026552253} is an apocalyptic number.

It is an amenable number.

21214026552253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214026552253 is an equidigital number, since it uses as much as digits as its factorization.

21214026552253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 21214026552253 its reverse (35225562041212), we get a palindrome (56439588593465).

The spelling of 21214026552253 in words is "twenty-one trillion, two hundred fourteen billion, twenty-six million, five hundred fifty-two thousand, two hundred fifty-three".