12220140281 has 4 divisors (see below), whose sum is σ = 12751450752. Its totient is φ = 11688829812.

The previous prime is 12220140223. The next prime is 12220140299. The reversal of 12220140281 is 18204102221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18204102221 = 19583 ⋅929587.

It is a cyclic number.

It is not a de Polignac number, because 12220140281 - 2⁶ = 12220140217 is a prime.

It is a super-2 number, since 2×12220140281² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 531310447 = 12220140281 / (1 + 2 + 2 + 2 + 0 + 1 + 4 + 0 + 2 + 8 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12220140181) 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, 265655201 + ... + 265655246.

It is an arithmetic number, because the mean of its divisors is an integer number (3187862688).

Almost surely, 2^12220140281 is an apocalyptic number.

It is an amenable number.

12220140281 is a deficient number, since it is larger than the sum of its proper divisors (531310471).

12220140281 is an equidigital number, since it uses as much as digits as its factorization.

12220140281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531310470.

The product of its (nonzero) digits is 512, while the sum is 23.

The spelling of 12220140281 in words is "twelve billion, two hundred twenty million, one hundred forty thousand, two hundred eighty-one".