12221212031 has 8 divisors (see below), whose sum is σ = 13970546304. Its totient is φ = 10472739480.

The previous prime is 12221212027. The next prime is 12221212039. The reversal of 12221212031 is 13021212221.

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

It is not a de Polignac number, because 12221212031 - 2² = 12221212027 is a prime.

It is a super-2 number, since 2×12221212031² (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 (12221212039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184745 + ... + 242018.

It is an arithmetic number, because the mean of its divisors is an integer number (1746318288).

Almost surely, 2^12221212031 is an apocalyptic number.

12221212031 is a deficient number, since it is larger than the sum of its proper divisors (1749334273).

12221212031 is an equidigital number, since it uses as much as digits as its factorization.

12221212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430861.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12221212031 its reverse (13021212221), we get a palindrome (25242424252).

The spelling of 12221212031 in words is "twelve billion, two hundred twenty-one million, two hundred twelve thousand, thirty-one".