31222123 has 2 divisors, whose sum is σ = 31222124. Its totient is φ = 31222122.

The previous prime is 31222099. The next prime is 31222127. The reversal of 31222123 is 32122213.

It is a strong prime.

It is an emirp because it is prime and its reverse (32122213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31222123 - 2⁵ = 31222091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31222097 and 31222106.

It is not a weakly prime, because it can be changed into another prime (31222127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611061 + 15611062.

It is an arithmetic number, because the mean of its divisors is an integer number (15611062).

Almost surely, 2^31222123 is an apocalyptic number.

31222123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222123 is an equidigital number, since it uses as much as digits as its factorization.

31222123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 16.

The square root of 31222123 is about 5587.6759927541. The cubic root of 31222123 is about 314.8865737585.

Adding to 31222123 its reverse (32122213), we get a palindrome (63344336).

The spelling of 31222123 in words is "thirty-one million, two hundred twenty-two thousand, one hundred twenty-three".