21311341144 has 16 divisors (see below), whose sum is σ = 39961364400. Its totient is φ = 10654977312.

The previous prime is 21311341123. The next prime is 21311341147. The reversal of 21311341144 is 44114311312.

It is a super-2 number, since 2×21311341144² (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 (21311341147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58242 + ... + 214510.

It is an arithmetic number, because the mean of its divisors is an integer number (2497585275).

Almost surely, 2^21311341144 is an apocalyptic number.

It is an amenable number.

21311341144 is a deficient number, since it is larger than the sum of its proper divisors (18650023256).

21311341144 is a wasteful number, since it uses less digits than its factorization.

21311341144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173322 (or 173318 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

Adding to 21311341144 its reverse (44114311312), we get a palindrome (65425652456).

The spelling of 21311341144 in words is "twenty-one billion, three hundred eleven million, three hundred forty-one thousand, one hundred forty-four".