212221230031 has 2 divisors, whose sum is σ = 212221230032. Its totient is φ = 212221230030.

The previous prime is 212221230007. The next prime is 212221230139. The reversal of 212221230031 is 130032122212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212221230031 is a prime.

It is a super-2 number, since 2×212221230031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212221229990 and 212221230008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221230631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110615015 + 106110615016.

It is an arithmetic number, because the mean of its divisors is an integer number (106110615016).

Almost surely, 2^212221230031 is an apocalyptic number.

212221230031 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221230031 is an equidigital number, since it uses as much as digits as its factorization.

212221230031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212221230031 its reverse (130032122212), we get a palindrome (342253352243).

The spelling of 212221230031 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred thirty thousand, thirty-one".