21341444231 has 4 divisors (see below), whose sum is σ = 21343150464. Its totient is φ = 21339738000.

The previous prime is 21341444167. The next prime is 21341444239. The reversal of 21341444231 is 13244414312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21341444231 - 2⁶ = 21341444167 is a prime.

It is a super-2 number, since 2×21341444231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21341444194 and 21341444203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341444239) 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, 834215 + ... + 859416.

It is an arithmetic number, because the mean of its divisors is an integer number (5335787616).

Almost surely, 2^21341444231 is an apocalyptic number.

21341444231 is a deficient number, since it is larger than the sum of its proper divisors (1706233).

21341444231 is a wasteful number, since it uses less digits than its factorization.

21341444231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706232.

The product of its digits is 9216, while the sum is 29.

Adding to 21341444231 its reverse (13244414312), we get a palindrome (34585858543).

The spelling of 21341444231 in words is "twenty-one billion, three hundred forty-one million, four hundred forty-four thousand, two hundred thirty-one".