21011022000253 has 2 divisors, whose sum is σ = 21011022000254. Its totient is φ = 21011022000252.

The previous prime is 21011022000139. The next prime is 21011022000257. The reversal of 21011022000253 is 35200022011012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12724758883684 + 8286263116569 = 3567178^2 + 2878587^2 .

It is a cyclic number.

It is not a de Polignac number, because 21011022000253 - 2²¹ = 21011019903101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21011022000253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011022000257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505511000126 + 10505511000127.

It is an arithmetic number, because the mean of its divisors is an integer number (10505511000127).

Almost surely, 2^{21011022000253} is an apocalyptic number.

It is an amenable number.

21011022000253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011022000253 is an equidigital number, since it uses as much as digits as its factorization.

21011022000253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 21011022000253 its reverse (35200022011012), we get a palindrome (56211044011265).

The spelling of 21011022000253 in words is "twenty-one trillion, eleven billion, twenty-two million, two hundred fifty-three", and thus it is an aban number.