212223219931 has 2 divisors, whose sum is σ = 212223219932. Its totient is φ = 212223219930.

The previous prime is 212223219851. The next prime is 212223219979. The reversal of 212223219931 is 139912322212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212223219931 is a prime.

It is a super-2 number, since 2×212223219931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212223219031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111609965 + 106111609966.

It is an arithmetic number, because the mean of its divisors is an integer number (106111609966).

Almost surely, 2^212223219931 is an apocalyptic number.

212223219931 is a deficient number, since it is larger than the sum of its proper divisors (1).

212223219931 is an equidigital number, since it uses as much as digits as its factorization.

212223219931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The spelling of 212223219931 in words is "two hundred twelve billion, two hundred twenty-three million, two hundred nineteen thousand, nine hundred thirty-one".