21010300250 has 16 divisors (see below), whose sum is σ = 39331282536. Its totient is φ = 8404120000.

The previous prime is 21010300243. The next prime is 21010300279. The reversal of 21010300250 is 5200301012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3306135001 + 17704165249 = 57499^2 + 133057^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42020351 + ... + 42020850.

Almost surely, 2^21010300250 is an apocalyptic number.

21010300250 is a deficient number, since it is larger than the sum of its proper divisors (18320982286).

21010300250 is an equidigital number, since it uses as much as digits as its factorization.

21010300250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84041218 (or 84041208 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

Adding to 21010300250 its reverse (5200301012), we get a palindrome (26210601262).

The spelling of 21010300250 in words is "twenty-one billion, ten million, three hundred thousand, two hundred fifty".