2121430266 has 12 divisors (see below), whose sum is σ = 4596432282. Its totient is φ = 707143416.

The previous prime is 2121430249. The next prime is 2121430291. The reversal of 2121430266 is 6620341212.

It can be written as a sum of positive squares in only one way, i.e., 1673219025 + 448211241 = 40905^2 + 21171^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58928601 + ... + 58928636.

Almost surely, 2^2121430266 is an apocalyptic number.

2121430266 is an abundant number, since it is smaller than the sum of its proper divisors (2475002016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121430266 is a wasteful number, since it uses less digits than its factorization.

2121430266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117857245 (or 117857242 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 2121430266 is about 46058.9868103935. The cubic root of 2121430266 is about 1284.9204866342.

Adding to 2121430266 its reverse (6620341212), we get a palindrome (8741771478).

The spelling of 2121430266 in words is "two billion, one hundred twenty-one million, four hundred thirty thousand, two hundred sixty-six".