31222003221001 has 4 divisors (see below), whose sum is σ = 31226865710404. Its totient is φ = 31217140731600.

The previous prime is 31222003220981. The next prime is 31222003221023. The reversal of 31222003221001 is 10012230022213.

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 15583735245376 + 15638267975625 = 3947624^2 + 3954525^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222003221001 - 2¹³ = 31222003212809 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 31222003221001.

It is not an unprimeable number, because it can be changed into a prime (31222003221701) 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, 2431235070 + ... + 2431247911.

It is an arithmetic number, because the mean of its divisors is an integer number (7806716427601).

Almost surely, 2^{31222003221001} is an apocalyptic number.

It is an amenable number.

31222003221001 is a deficient number, since it is larger than the sum of its proper divisors (4862489403).

31222003221001 is an equidigital number, since it uses as much as digits as its factorization.

31222003221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862489402.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31222003221001 its reverse (10012230022213), we get a palindrome (41234233243214).

The spelling of 31222003221001 in words is "thirty-one trillion, two hundred twenty-two billion, three million, two hundred twenty-one thousand, one".