31321222001 has 4 divisors (see below), whose sum is σ = 31327775232. Its totient is φ = 31314668772.

The previous prime is 31321221979. The next prime is 31321222021. The reversal of 31321222001 is 10022212313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10022212313 = 79 ⋅126863447.

It is a cyclic number.

It is not a de Polignac number, because 31321222001 - 2⁶ = 31321221937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321222021) 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, 3269441 + ... + 3279006.

It is an arithmetic number, because the mean of its divisors is an integer number (7831943808).

Almost surely, 2^31321222001 is an apocalyptic number.

It is an amenable number.

31321222001 is a deficient number, since it is larger than the sum of its proper divisors (6553231).

31321222001 is an equidigital number, since it uses as much as digits as its factorization.

31321222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6553230.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31321222001 its reverse (10022212313), we get a palindrome (41343434314).

The spelling of 31321222001 in words is "thirty-one billion, three hundred twenty-one million, two hundred twenty-two thousand, one".