21150022253 has 2 divisors, whose sum is σ = 21150022254. Its totient is φ = 21150022252.

The previous prime is 21150022247. The next prime is 21150022259. The reversal of 21150022253 is 35222005112.

It is a balanced prime because it is at equal distance from previous prime (21150022247) and next prime (21150022259).

It can be written as a sum of positive squares in only one way, i.e., 14928441124 + 6221581129 = 122182^2 + 78877^2 .

It is a cyclic number.

It is not a de Polignac number, because 21150022253 - 2⁴ = 21150022237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21150022259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10575011126 + 10575011127.

It is an arithmetic number, because the mean of its divisors is an integer number (10575011127).

Almost surely, 2^21150022253 is an apocalyptic number.

It is an amenable number.

21150022253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21150022253 is an equidigital number, since it uses as much as digits as its factorization.

21150022253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 21150022253 its reverse (35222005112), we get a palindrome (56372027365).

The spelling of 21150022253 in words is "twenty-one billion, one hundred fifty million, twenty-two thousand, two hundred fifty-three".