31120021222133 has 2 divisors, whose sum is σ = 31120021222134. Its totient is φ = 31120021222132.

The previous prime is 31120021222099. The next prime is 31120021222187. The reversal of 31120021222133 is 33122212002113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30006654375889 + 1113366846244 = 5477833^2 + 1055162^2 .

It is a cyclic number.

It is not a de Polignac number, because 31120021222133 - 2²⁸ = 31119752786677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31120021222099 and 31120021222108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31120021222193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560010611066 + 15560010611067.

It is an arithmetic number, because the mean of its divisors is an integer number (15560010611067).

Almost surely, 2^{31120021222133} is an apocalyptic number.

It is an amenable number.

31120021222133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120021222133 is an equidigital number, since it uses as much as digits as its factorization.

31120021222133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31120021222133 its reverse (33122212002113), we get a palindrome (64242233224246).

The spelling of 31120021222133 in words is "thirty-one trillion, one hundred twenty billion, twenty-one million, two hundred twenty-two thousand, one hundred thirty-three".