1123213021109 has 2 divisors, whose sum is σ = 1123213021110. Its totient is φ = 1123213021108.

The previous prime is 1123213021039. The next prime is 1123213021121. The reversal of 1123213021109 is 9011203123211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 826953796900 + 296259224209 = 909370^2 + 544297^2 .

It is an emirp because it is prime and its reverse (9011203123211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123213021109 - 2¹⁶ = 1123212955573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123213021309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561606510554 + 561606510555.

It is an arithmetic number, because the mean of its divisors is an integer number (561606510555).

Almost surely, 2^{1123213021109} is an apocalyptic number.

It is an amenable number.

1123213021109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123213021109 is an equidigital number, since it uses as much as digits as its factorization.

1123213021109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 1123213021109 in words is "one trillion, one hundred twenty-three billion, two hundred thirteen million, twenty-one thousand, one hundred nine".