2756621121 has 4 divisors (see below), whose sum is σ = 3675494832. Its totient is φ = 1837747412.

The previous prime is 2756621113. The next prime is 2756621159. The reversal of 2756621121 is 1211266572.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2756621121 - 2³ = 2756621113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2756620121) 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, 459436851 + ... + 459436856.

It is an arithmetic number, because the mean of its divisors is an integer number (918873708).

Almost surely, 2^2756621121 is an apocalyptic number.

It is an amenable number.

2756621121 is a deficient number, since it is larger than the sum of its proper divisors (918873711).

2756621121 is an equidigital number, since it uses as much as digits as its factorization.

2756621121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918873710.

The product of its digits is 10080, while the sum is 33.

The square root of 2756621121 is about 52503.5343667453. The cubic root of 2756621121 is about 1402.1431666446.

Adding to 2756621121 its reverse (1211266572), we get a palindrome (3967887693).

The spelling of 2756621121 in words is "two billion, seven hundred fifty-six million, six hundred twenty-one thousand, one hundred twenty-one".