12221134523 has 4 divisors (see below), whose sum is σ = 13161221808. Its totient is φ = 11281047240.

The previous prime is 12221134517. The next prime is 12221134547. The reversal of 12221134523 is 32543112221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32543112221 = 47 ⋅692406643.

It is a cyclic number.

It is not a de Polignac number, because 12221134523 - 2⁶ = 12221134459 is a prime.

It is a super-2 number, since 2×12221134523² (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 = 12221134492 and 12221134501.

It is not an unprimeable number, because it can be changed into a prime (12221139523) 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, 470043623 + ... + 470043648.

It is an arithmetic number, because the mean of its divisors is an integer number (3290305452).

Almost surely, 2^12221134523 is an apocalyptic number.

12221134523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12221134523 is a deficient number, since it is larger than the sum of its proper divisors (940087285).

12221134523 is an equidigital number, since it uses as much as digits as its factorization.

12221134523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940087284.

The product of its digits is 2880, while the sum is 26.

Adding to 12221134523 its reverse (32543112221), we get a palindrome (44764246744).

The spelling of 12221134523 in words is "twelve billion, two hundred twenty-one million, one hundred thirty-four thousand, five hundred twenty-three".