21200531203 has 2 divisors, whose sum is σ = 21200531204. Its totient is φ = 21200531202.

The previous prime is 21200531197. The next prime is 21200531237. The reversal of 21200531203 is 30213500212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21200531203 - 2¹³ = 21200523011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21200534203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600265601 + 10600265602.

It is an arithmetic number, because the mean of its divisors is an integer number (10600265602).

Almost surely, 2^21200531203 is an apocalyptic number.

21200531203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200531203 is an equidigital number, since it uses as much as digits as its factorization.

21200531203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The spelling of 21200531203 in words is "twenty-one billion, two hundred million, five hundred thirty-one thousand, two hundred three".