21203010053 has 2 divisors, whose sum is σ = 21203010054. Its totient is φ = 21203010052.

The previous prime is 21203010001. The next prime is 21203010061. The reversal of 21203010053 is 35001030212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19442955844 + 1760054209 = 139438^2 + 41953^2 .

It is a cyclic number.

It is not a de Polignac number, because 21203010053 - 2²⁸ = 20934574597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21203010083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601505026 + 10601505027.

It is an arithmetic number, because the mean of its divisors is an integer number (10601505027).

Almost surely, 2^21203010053 is an apocalyptic number.

It is an amenable number.

21203010053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203010053 is an equidigital number, since it uses as much as digits as its factorization.

21203010053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 21203010053 its reverse (35001030212), we get a palindrome (56204040265).

The spelling of 21203010053 in words is "twenty-one billion, two hundred three million, ten thousand, fifty-three".