16221312134 has 8 divisors (see below), whose sum is σ = 24582813528. Its totient is φ = 8027040960.

The previous prime is 16221312113. The next prime is 16221312157. The reversal of 16221312134 is 43121312261.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41807312 + ... + 41807699.

It is an arithmetic number, because the mean of its divisors is an integer number (3072851691).

Almost surely, 2^16221312134 is an apocalyptic number.

16221312134 is a deficient number, since it is larger than the sum of its proper divisors (8361501394).

16221312134 is an equidigital number, since it uses as much as digits as its factorization.

16221312134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83615110.

The product of its digits is 1728, while the sum is 26.

Adding to 16221312134 its reverse (43121312261), we get a palindrome (59342624395).

The spelling of 16221312134 in words is "sixteen billion, two hundred twenty-one million, three hundred twelve thousand, one hundred thirty-four".