222109869731 has 2 divisors, whose sum is σ = 222109869732. Its totient is φ = 222109869730.

The previous prime is 222109869713. The next prime is 222109869733. The reversal of 222109869731 is 137968901222.

Together with previous prime (222109869713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222109869731 is a prime.

It is a super-2 number, since 2×222109869731² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 222109869733, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222109869731.

It is not a weakly prime, because it can be changed into another prime (222109869733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111054934865 + 111054934866.

It is an arithmetic number, because the mean of its divisors is an integer number (111054934866).

Almost surely, 2^222109869731 is an apocalyptic number.

222109869731 is a deficient number, since it is larger than the sum of its proper divisors (1).

222109869731 is an equidigital number, since it uses as much as digits as its factorization.

222109869731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 222109869731 in words is "two hundred twenty-two billion, one hundred nine million, eight hundred sixty-nine thousand, seven hundred thirty-one".