2101010220109 has 4 divisors (see below), whose sum is σ = 2224599056604. Its totient is φ = 1977421383616.

The previous prime is 2101010220107. The next prime is 2101010220119. The reversal of 2101010220109 is 9010220101012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1969469810884 + 131540409225 = 1403378^2 + 362685^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101010220109 - 2¹ = 2101010220107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101010220107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61794418222 + ... + 61794418255.

It is an arithmetic number, because the mean of its divisors is an integer number (556149764151).

Almost surely, 2^{2101010220109} is an apocalyptic number.

It is an amenable number.

2101010220109 is a deficient number, since it is larger than the sum of its proper divisors (123588836495).

2101010220109 is a wasteful number, since it uses less digits than its factorization.

2101010220109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123588836494.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 2101010220109 in words is "two trillion, one hundred one billion, ten million, two hundred twenty thousand, one hundred nine".