212222103109 has 2 divisors, whose sum is σ = 212222103110. Its totient is φ = 212222103108.

The previous prime is 212222103089. The next prime is 212222103127. The reversal of 212222103109 is 901301222212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208623303009 + 3598800100 = 456753^2 + 59990^2 .

It is a cyclic number.

It is not a de Polignac number, because 212222103109 - 2²¹ = 212220005957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212222103139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111051554 + 106111051555.

It is an arithmetic number, because the mean of its divisors is an integer number (106111051555).

Almost surely, 2^212222103109 is an apocalyptic number.

It is an amenable number.

212222103109 is a deficient number, since it is larger than the sum of its proper divisors (1).

212222103109 is an equidigital number, since it uses as much as digits as its factorization.

212222103109 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 25.

It can be divided in two parts, 212222103 and 109, that added together give a palindrome (212222212).

The spelling of 212222103109 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred three thousand, one hundred nine".