2121455266 has 16 divisors (see below), whose sum is σ = 3680599104. Its totient is φ = 898240464.

The previous prime is 2121455261. The next prime is 2121455311. The reversal of 2121455266 is 6625541212.

It is not an unprimeable number, because it can be changed into a prime (2121455261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 911685 + ... + 914008.

It is an arithmetic number, because the mean of its divisors is an integer number (230037444).

Almost surely, 2^2121455266 is an apocalyptic number.

2121455266 is a deficient number, since it is larger than the sum of its proper divisors (1559143838).

2121455266 is a wasteful number, since it uses less digits than its factorization.

2121455266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825785.

The product of its digits is 28800, while the sum is 34.

The square root of 2121455266 is about 46059.2582007136. The cubic root of 2121455266 is about 1284.9255339972.

Adding to 2121455266 its reverse (6625541212), we get a palindrome (8746996478).

The spelling of 2121455266 in words is "two billion, one hundred twenty-one million, four hundred fifty-five thousand, two hundred sixty-six".