21344322131 has 8 divisors (see below), whose sum is σ = 23286454464. Its totient is φ = 19402479720.

The previous prime is 21344322113. The next prime is 21344322169. The reversal of 21344322131 is 13122344312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21344322131 - 2⁶ = 21344322067 is a prime.

It is a super-2 number, since 2×21344322131² (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 21344322131.

It is not an unprimeable number, because it can be changed into a prime (21344322431) 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, 99140 + ... + 229166.

It is an arithmetic number, because the mean of its divisors is an integer number (2910806808).

Almost surely, 2^21344322131 is an apocalyptic number.

21344322131 is a deficient number, since it is larger than the sum of its proper divisors (1942132333).

21344322131 is a wasteful number, since it uses less digits than its factorization.

21344322131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144961.

The product of its digits is 3456, while the sum is 26.

Adding to 21344322131 its reverse (13122344312), we get a palindrome (34466666443).

It can be divided in two parts, 213 and 44322131, that added together give a palindrome (44322344).

The spelling of 21344322131 in words is "twenty-one billion, three hundred forty-four million, three hundred twenty-two thousand, one hundred thirty-one".