31142422203121 has 8 divisors (see below), whose sum is σ = 31800683284200. Its totient is φ = 30486778463232.

The previous prime is 31142422203107. The next prime is 31142422203187. The reversal of 31142422203121 is 12130222424113.

It can be written as a sum of positive squares in 4 ways, for example, as 10323780268096 + 20818641935025 = 3213064^2 + 4562745^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31142422203121 - 2¹⁹ = 31142421678833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31142422203121.

It is not an unprimeable number, because it can be changed into a prime (31142422203421) 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, 654311250 + ... + 654358843.

It is an arithmetic number, because the mean of its divisors is an integer number (3975085410525).

Almost surely, 2^{31142422203121} is an apocalyptic number.

It is an amenable number.

31142422203121 is a deficient number, since it is larger than the sum of its proper divisors (658261081079).

31142422203121 is a wasteful number, since it uses less digits than its factorization.

31142422203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308670595.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 31142422203121 its reverse (12130222424113), we get a palindrome (43272644627234).

The spelling of 31142422203121 in words is "thirty-one trillion, one hundred forty-two billion, four hundred twenty-two million, two hundred three thousand, one hundred twenty-one".