1021112211109 has 2 divisors, whose sum is σ = 1021112211110. Its totient is φ = 1021112211108.

The previous prime is 1021112211029. The next prime is 1021112211113. The reversal of 1021112211109 is 9011122111201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 577493604900 + 443618606209 = 759930^2 + 666047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021112211109 - 2²⁵ = 1021078656677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021112211109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021112211199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510556105554 + 510556105555.

It is an arithmetic number, because the mean of its divisors is an integer number (510556105555).

Almost surely, 2^{1021112211109} is an apocalyptic number.

It is an amenable number.

1021112211109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021112211109 is an equidigital number, since it uses as much as digits as its factorization.

1021112211109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 1021112211109 in words is "one trillion, twenty-one billion, one hundred twelve million, two hundred eleven thousand, one hundred nine".