2721149109 has 12 divisors (see below), whose sum is σ = 4492055776. Its totient is φ = 1554942312.

The previous prime is 2721149099. The next prime is 2721149173. The reversal of 2721149109 is 9019411272.

It is not a de Polignac number, because 2721149109 - 2¹¹ = 2721147061 is a prime.

It is a super-2 number, since 2×2721149109² = 14809304946822987762, which 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 (2721149209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21596359 + ... + 21596484.

Almost surely, 2^2721149109 is an apocalyptic number.

It is an amenable number.

2721149109 is a deficient number, since it is larger than the sum of its proper divisors (1770906667).

2721149109 is a wasteful number, since it uses less digits than its factorization.

2721149109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43192856 (or 43192853 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2721149109 is about 52164.6346579749. The cubic root of 2721149109 is about 1396.1029562918.

The spelling of 2721149109 in words is "two billion, seven hundred twenty-one million, one hundred forty-nine thousand, one hundred nine".