31020320221133 has 4 divisors (see below), whose sum is σ = 31021917003840. Its totient is φ = 31018723438428.

The previous prime is 31020320221103. The next prime is 31020320221141. The reversal of 31020320221133 is 33112202302013.

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 31020320221133 - 2¹⁶ = 31020320155597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020320221099 and 31020320221108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020320221103) 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, 798362213 + ... + 798401066.

It is an arithmetic number, because the mean of its divisors is an integer number (7755479250960).

Almost surely, 2^{31020320221133} is an apocalyptic number.

It is an amenable number.

31020320221133 is a deficient number, since it is larger than the sum of its proper divisors (1596782707).

31020320221133 is a wasteful number, since it uses less digits than its factorization.

31020320221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596782706.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31020320221133 its reverse (33112202302013), we get a palindrome (64132522523146).

The spelling of 31020320221133 in words is "thirty-one trillion, twenty billion, three hundred twenty million, two hundred twenty-one thousand, one hundred thirty-three".