2121277 has 4 divisors (see below), whose sum is σ = 2246076. Its totient is φ = 1996480.

The previous prime is 2121271. The next prime is 2121289. The reversal of 2121277 is 7721212.

2121277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1490841 + 630436 = 1221^2 + 794^2 .

It is not a de Polignac number, because 2121277 - 2¹⁹ = 1596989 is a prime.

It is a super-2 number, since 2×2121277² = 8999632221458, 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 (2121271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62374 + ... + 62407.

It is an arithmetic number, because the mean of its divisors is an integer number (561519).

2^2121277 is an apocalyptic number.

It is an amenable number.

2121277 is a deficient number, since it is larger than the sum of its proper divisors (124799).

2121277 is a wasteful number, since it uses less digits than its factorization.

2121277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124798.

The product of its digits is 392, while the sum is 22.

The square root of 2121277 is about 1456.4604354393. The cubic root of 2121277 is about 128.4889542202.

Adding to 2121277 its reverse (7721212), we get a palindrome (9842489).

The spelling of 2121277 in words is "two million, one hundred twenty-one thousand, two hundred seventy-seven".