21266231134 has 8 divisors (see below), whose sum is σ = 31930839720. Its totient is φ = 10622617896.

The previous prime is 21266231131. The next prime is 21266231149. The reversal of 21266231134 is 43113266212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21266231096 and 21266231105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21266231131) 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, 5246304 + ... + 5250355.

It is an arithmetic number, because the mean of its divisors is an integer number (3991354965).

Almost surely, 2^21266231134 is an apocalyptic number.

21266231134 is a deficient number, since it is larger than the sum of its proper divisors (10664608586).

21266231134 is a wasteful number, since it uses less digits than its factorization.

21266231134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10497674.

The product of its digits is 10368, while the sum is 31.

Adding to 21266231134 its reverse (43113266212), we get a palindrome (64379497346).

The spelling of 21266231134 in words is "twenty-one billion, two hundred sixty-six million, two hundred thirty-one thousand, one hundred thirty-four".