21144131310 has 64 divisors (see below), whose sum is σ = 54378438912. Its totient is φ = 5242814976.

The previous prime is 21144131299. The next prime is 21144131341. The reversal of 21144131310 is 1313144112.

It is a super-2 number, since 2×21144131310² (a number of 21 digits) contains 22 as substring.

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, 207424 + ... + 292083.

It is an arithmetic number, because the mean of its divisors is an integer number (849663108).

Almost surely, 2^21144131310 is an apocalyptic number.

21144131310 is an abundant number, since it is smaller than the sum of its proper divisors (33234307602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21144131310 is a wasteful number, since it uses less digits than its factorization.

21144131310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499617.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21144131310 its reverse (1313144112), we get a palindrome (22457275422).

The spelling of 21144131310 in words is "twenty-one billion, one hundred forty-four million, one hundred thirty-one thousand, three hundred ten".