2121633066 has 24 divisors (see below), whose sum is σ = 4936044960. Its totient is φ = 606180792.

The previous prime is 2121633061. The next prime is 2121633077. The reversal of 2121633066 is 6603361212.

It is not an unprimeable number, because it can be changed into a prime (2121633061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3607926 + ... + 3608513.

It is an arithmetic number, because the mean of its divisors is an integer number (205668540).

Almost surely, 2^2121633066 is an apocalyptic number.

2121633066 is an abundant number, since it is smaller than the sum of its proper divisors (2814411894).

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

2121633066 is a wasteful number, since it uses less digits than its factorization.

2121633066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7216458 (or 7216451 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 2121633066 is about 46061.1882825443. The cubic root of 2121633066 is about 1284.9614296992.

Adding to 2121633066 its reverse (6603361212), we get a palindrome (8724994278).

The spelling of 2121633066 in words is "two billion, one hundred twenty-one million, six hundred thirty-three thousand, sixty-six".