21312303010 has 32 divisors (see below), whose sum is σ = 40044896640. Its totient is φ = 8151251328.

The previous prime is 21312303007. The next prime is 21312303013. The reversal of 21312303010 is 1030321312.

It is an interprime number because it is at equal distance from previous prime (21312303007) and next prime (21312303013).

It is not an unprimeable number, because it can be changed into a prime (21312303013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 663501 + ... + 694879.

It is an arithmetic number, because the mean of its divisors is an integer number (1251403020).

Almost surely, 2^21312303010 is an apocalyptic number.

21312303010 is a deficient number, since it is larger than the sum of its proper divisors (18732593630).

21312303010 is a wasteful number, since it uses less digits than its factorization.

21312303010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34362.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21312303010 its reverse (1030321312), we get a palindrome (22342624322).

The spelling of 21312303010 in words is "twenty-one billion, three hundred twelve million, three hundred three thousand, ten".