31222121133 has 8 divisors (see below), whose sum is σ = 47576565568. Its totient is φ = 17841212064.

The previous prime is 31222121131. The next prime is 31222121159. The reversal of 31222121133 is 33112122213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31222121133 - 2¹ = 31222121131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1486767673 = 31222121133 / (3 + 1 + 2 + 2 + 2 + 1 + 2 + 1 + 1 + 3 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222121131) 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, 743383816 + ... + 743383857.

It is an arithmetic number, because the mean of its divisors is an integer number (5947070696).

Almost surely, 2^31222121133 is an apocalyptic number.

It is an amenable number.

31222121133 is a deficient number, since it is larger than the sum of its proper divisors (16354444435).

31222121133 is a wasteful number, since it uses less digits than its factorization.

31222121133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486767683.

The product of its digits is 432, while the sum is 21.

Adding to 31222121133 its reverse (33112122213), we get a palindrome (64334243346).

The spelling of 31222121133 in words is "thirty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred thirty-three".