21023311010 has 24 divisors (see below), whose sum is σ = 40976800020. Its totient is φ = 7762452672.

The previous prime is 21023311009. The next prime is 21023311033. The reversal of 21023311010 is 1011332012.

It can be written as a sum of positive squares in 6 ways, for example, as 9009616561 + 12013694449 = 94919^2 + 109607^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6218225 + ... + 6221604.

Almost surely, 2^21023311010 is an apocalyptic number.

21023311010 is a deficient number, since it is larger than the sum of its proper divisors (19953489010).

21023311010 is a wasteful number, since it uses less digits than its factorization.

21023311010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12439862 (or 12439849 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21023311010 its reverse (1011332012), we get a palindrome (22034643022).

The spelling of 21023311010 in words is "twenty-one billion, twenty-three million, three hundred eleven thousand, ten".