31223122003221 has 16 divisors (see below), whose sum is σ = 41645853849600. Its totient is φ = 20807902913328.

The previous prime is 31223122003193. The next prime is 31223122003247. The reversal of 31223122003221 is 12230022132213.

It is not a de Polignac number, because 31223122003221 - 2²³ = 31223113614613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31223122003191 and 31223122003200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223122003291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392412640 + ... + 392492198.

It is an arithmetic number, because the mean of its divisors is an integer number (2602865865600).

Almost surely, 2^{31223122003221} is an apocalyptic number.

It is an amenable number.

31223122003221 is a deficient number, since it is larger than the sum of its proper divisors (10422731846379).

31223122003221 is a wasteful number, since it uses less digits than its factorization.

31223122003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125128.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31223122003221 its reverse (12230022132213), we get a palindrome (43453144135434).

The spelling of 31223122003221 in words is "thirty-one trillion, two hundred twenty-three billion, one hundred twenty-two million, three thousand, two hundred twenty-one".