212212231109 has 2 divisors, whose sum is σ = 212212231110. Its totient is φ = 212212231108.

The previous prime is 212212231039. The next prime is 212212231129. The reversal of 212212231109 is 901132212212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187861564900 + 24350666209 = 433430^2 + 156047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212212231109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212212231129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106115554 + 106106115555.

It is an arithmetic number, because the mean of its divisors is an integer number (106106115555).

Almost surely, 2^212212231109 is an apocalyptic number.

It is an amenable number.

212212231109 is a deficient number, since it is larger than the sum of its proper divisors (1).

212212231109 is an equidigital number, since it uses as much as digits as its factorization.

212212231109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 212212231109 in words is "two hundred twelve billion, two hundred twelve million, two hundred thirty-one thousand, one hundred nine".