31322321101221 has 4 divisors (see below), whose sum is σ = 41763094801632. Its totient is φ = 20881547400812.

The previous prime is 31322321101193. The next prime is 31322321101259. The reversal of 31322321101221 is 12210112322313.

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 31322321101221 - 2⁹ = 31322321100709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31322321101191 and 31322321101200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322321101921) 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, 5220386850201 + ... + 5220386850206.

It is an arithmetic number, because the mean of its divisors is an integer number (10440773700408).

Almost surely, 2^{31322321101221} is an apocalyptic number.

It is an amenable number.

31322321101221 is a deficient number, since it is larger than the sum of its proper divisors (10440773700411).

31322321101221 is a wasteful number, since it uses less digits than its factorization.

31322321101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10440773700410.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31322321101221 its reverse (12210112322313), we get a palindrome (43532433423534).

The spelling of 31322321101221 in words is "thirty-one trillion, three hundred twenty-two billion, three hundred twenty-one million, one hundred one thousand, two hundred twenty-one".