12211144381 has 4 divisors (see below), whose sum is σ = 12245737212. Its totient is φ = 12176551552.

The previous prime is 12211144339. The next prime is 12211144399. The reversal of 12211144381 is 18344111221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3146200281 + 9064944100 = 56091^2 + 95210^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211144381 - 2¹⁵ = 12211111613 is a prime.

It is a super-2 number, since 2×12211144381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211144481) 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, 17295886 + ... + 17296591.

It is an arithmetic number, because the mean of its divisors is an integer number (3061434303).

Almost surely, 2^12211144381 is an apocalyptic number.

It is an amenable number.

12211144381 is a deficient number, since it is larger than the sum of its proper divisors (34592831).

12211144381 is an equidigital number, since it uses as much as digits as its factorization.

12211144381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34592830.

The product of its digits is 1536, while the sum is 28.

The spelling of 12211144381 in words is "twelve billion, two hundred eleven million, one hundred forty-four thousand, three hundred eighty-one".