2121455411 has 4 divisors (see below), whose sum is σ = 2121603000. Its totient is φ = 2121307824.

The previous prime is 2121455387. The next prime is 2121455423. The reversal of 2121455411 is 1145541212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121455411 is a prime.

It is a super-2 number, since 2×2121455411² = 9001146121722357842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121455471) 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, 49586 + ... + 81863.

It is an arithmetic number, because the mean of its divisors is an integer number (530400750).

Almost surely, 2^2121455411 is an apocalyptic number.

2121455411 is a deficient number, since it is larger than the sum of its proper divisors (147589).

2121455411 is a wasteful number, since it uses less digits than its factorization.

2121455411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147588.

The product of its digits is 1600, while the sum is 26.

The square root of 2121455411 is about 46059.2597747728. The cubic root of 2121455411 is about 1284.9255632718.

Adding to 2121455411 its reverse (1145541212), we get a palindrome (3266996623).

The spelling of 2121455411 in words is "two billion, one hundred twenty-one million, four hundred fifty-five thousand, four hundred eleven".