31223221141 has 4 divisors (see below), whose sum is σ = 35683681312. Its totient is φ = 26762760972.

The previous prime is 31223221129. The next prime is 31223221213. The reversal of 31223221141 is 14112232213.

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.

It is a cyclic number.

It is not a de Polignac number, because 31223221141 - 2⁵ = 31223221109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223221541) 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, 2230230075 + ... + 2230230088.

It is an arithmetic number, because the mean of its divisors is an integer number (8920920328).

Almost surely, 2^31223221141 is an apocalyptic number.

It is an amenable number.

31223221141 is a deficient number, since it is larger than the sum of its proper divisors (4460460171).

31223221141 is an equidigital number, since it uses as much as digits as its factorization.

31223221141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460460170.

The product of its digits is 576, while the sum is 22.

Adding to 31223221141 its reverse (14112232213), we get a palindrome (45335453354).

The spelling of 31223221141 in words is "thirty-one billion, two hundred twenty-three million, two hundred twenty-one thousand, one hundred forty-one".