2101231240109 has 2 divisors, whose sum is σ = 2101231240110. Its totient is φ = 2101231240108.

The previous prime is 2101231240079. The next prime is 2101231240123. The reversal of 2101231240109 is 9010421321012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1864923446884 + 236307793225 = 1365622^2 + 486115^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101231240109 - 2²⁸ = 2100962804653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101231245109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050615620054 + 1050615620055.

It is an arithmetic number, because the mean of its divisors is an integer number (1050615620055).

Almost surely, 2^{2101231240109} is an apocalyptic number.

It is an amenable number.

2101231240109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101231240109 is an equidigital number, since it uses as much as digits as its factorization.

2101231240109 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 2101231240109 in words is "two trillion, one hundred one billion, two hundred thirty-one million, two hundred forty thousand, one hundred nine".