2621121160109 has 4 divisors (see below), whose sum is σ = 2621136711516. Its totient is φ = 2621105608704.

The previous prime is 2621121160093. The next prime is 2621121160117. The reversal of 2621121160109 is 9010611211262.

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 568520524009 + 2052600636100 = 754003^2 + 1432690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2621121160109 - 2⁴ = 2621121160093 is a prime.

It is a super-2 number, since 2×2621121160109² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621121160139) 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, 7520084 + ... + 7860909.

It is an arithmetic number, because the mean of its divisors is an integer number (655284177879).

Almost surely, 2^{2621121160109} is an apocalyptic number.

It is an amenable number.

2621121160109 is a deficient number, since it is larger than the sum of its proper divisors (15551407).

2621121160109 is a wasteful number, since it uses less digits than its factorization.

2621121160109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15551406.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 2621121160109 in words is "two trillion, six hundred twenty-one billion, one hundred twenty-one million, one hundred sixty thousand, one hundred nine".