31423344421121 has 4 divisors (see below), whose sum is σ = 31423379720532. Its totient is φ = 31423309121712.

The previous prime is 31423344421103. The next prime is 31423344421169. The reversal of 31423344421121 is 12112444332413.

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 10769955261121 + 20653389160000 = 3281761^2 + 4544600^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423344421121 - 2¹⁴ = 31423344404737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31423344421421) 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, 16278926 + ... + 18106631.

It is an arithmetic number, because the mean of its divisors is an integer number (7855844930133).

Almost surely, 2^{31423344421121} is an apocalyptic number.

It is an amenable number.

31423344421121 is a deficient number, since it is larger than the sum of its proper divisors (35299411).

31423344421121 is an equidigital number, since it uses as much as digits as its factorization.

31423344421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35299410.

The product of its digits is 55296, while the sum is 35.

Adding to 31423344421121 its reverse (12112444332413), we get a palindrome (43535788753534).

The spelling of 31423344421121 in words is "thirty-one trillion, four hundred twenty-three billion, three hundred forty-four million, four hundred twenty-one thousand, one hundred twenty-one".