21012240310 has 16 divisors (see below), whose sum is σ = 37901001600. Its totient is φ = 8387347456.

The previous prime is 21012240307. The next prime is 21012240313. The reversal of 21012240310 is 1304221012.

It is an interprime number because it is at equal distance from previous prime (21012240307) and next prime (21012240313).

It is a super-2 number, since 2×21012240310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012240313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2188555 + ... + 2198134.

It is an arithmetic number, because the mean of its divisors is an integer number (2368812600).

Almost surely, 2^21012240310 is an apocalyptic number.

21012240310 is a deficient number, since it is larger than the sum of its proper divisors (16888761290).

21012240310 is a wasteful number, since it uses less digits than its factorization.

21012240310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4387175.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21012240310 its reverse (1304221012), we get a palindrome (22316461322).

The spelling of 21012240310 in words is "twenty-one billion, twelve million, two hundred forty thousand, three hundred ten".