21314444131 has 32 divisors (see below), whose sum is σ = 23302540800. Its totient is φ = 19428491520.

The previous prime is 21314444111. The next prime is 21314444171. The reversal of 21314444131 is 13144441312.

It is a cyclic number.

It is not a de Polignac number, because 21314444131 - 2²³ = 21306055523 is a prime.

It is a super-2 number, since 2×21314444131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21314444131.

It is not an unprimeable number, because it can be changed into a prime (21314444111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24029370 + ... + 24030256.

It is an arithmetic number, because the mean of its divisors is an integer number (728204400).

Almost surely, 2^21314444131 is an apocalyptic number.

21314444131 is a deficient number, since it is larger than the sum of its proper divisors (1988096669).

21314444131 is a wasteful number, since it uses less digits than its factorization.

21314444131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339.

The product of its digits is 4608, while the sum is 28.

Adding to 21314444131 its reverse (13144441312), we get a palindrome (34458885443).

It can be divided in two parts, 2 and 1314444131, that multiplied together give a palindrome (2628888262).

The spelling of 21314444131 in words is "twenty-one billion, three hundred fourteen million, four hundred forty-four thousand, one hundred thirty-one".