31143442022221 has 8 divisors (see below), whose sum is σ = 31343966787224. Its totient is φ = 30942944585280.

The previous prime is 31143442022171. The next prime is 31143442022227. The reversal of 31143442022221 is 12222024434113.

It can be written as a sum of positive squares in 4 ways, for example, as 1201325602500 + 29942116419721 = 1096050^2 + 5471939^2 .

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 31143442022221 - 2¹³ = 31143442014029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143442022227) 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, 4542990 + ... + 9106351.

It is an arithmetic number, because the mean of its divisors is an integer number (3917995848403).

Almost surely, 2^{31143442022221} is an apocalyptic number.

It is an amenable number.

31143442022221 is a deficient number, since it is larger than the sum of its proper divisors (200524765003).

31143442022221 is a wasteful number, since it uses less digits than its factorization.

31143442022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13664031.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 31143442022221 its reverse (12222024434113), we get a palindrome (43365466456334).

The spelling of 31143442022221 in words is "thirty-one trillion, one hundred forty-three billion, four hundred forty-two million, twenty-two thousand, two hundred twenty-one".