7121281149 has 24 divisors (see below), whose sum is σ = 10833288960. Its totient is φ = 4495321152.

The previous prime is 7121281129. The next prime is 7121281159. The reversal of 7121281149 is 9411821217.

It is not a de Polignac number, because 7121281149 - 2²⁰ = 7120232573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121281129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 356737 + ... + 376169.

It is an arithmetic number, because the mean of its divisors is an integer number (451387040).

Almost surely, 2^7121281149 is an apocalyptic number.

It is an amenable number.

7121281149 is a deficient number, since it is larger than the sum of its proper divisors (3712007811).

7121281149 is a wasteful number, since it uses less digits than its factorization.

7121281149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21601 (or 21598 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 7121281149 is about 84387.6836333360. The cubic root of 7121281149 is about 1923.9157236963.

The spelling of 7121281149 in words is "seven billion, one hundred twenty-one million, two hundred eighty-one thousand, one hundred forty-nine".