21240402322310 has 64 divisors (see below), whose sum is σ = 39296790081792. Its totient is φ = 8260064833536.

The previous prime is 21240402322303. The next prime is 21240402322343. The reversal of 21240402322310 is 1322320404212.

It is a super-2 number, since 2×21240402322310² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21240402322310.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4706490614 + ... + 4706495126.

It is an arithmetic number, because the mean of its divisors is an integer number (614012345028).

Almost surely, 2^{21240402322310} is an apocalyptic number.

21240402322310 is a deficient number, since it is larger than the sum of its proper divisors (18056387759482).

21240402322310 is a wasteful number, since it uses less digits than its factorization.

21240402322310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11697.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21240402322310 its reverse (1322320404212), we get a palindrome (22562722726522).

The spelling of 21240402322310 in words is "twenty-one trillion, two hundred forty billion, four hundred two million, three hundred twenty-two thousand, three hundred ten".