2121633 has 12 divisors (see below), whose sum is σ = 3178448. Its totient is φ = 1414260.

The previous prime is 2121631. The next prime is 2121653. The reversal of 2121633 is 3361212.

It is not a de Polignac number, because 2121633 - 2¹ = 2121631 is a prime.

It is a Duffinian number.

2121633 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2121631) 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, 4123 + ... + 4608.

2^2121633 is an apocalyptic number.

It is an amenable number.

2121633 is a deficient number, since it is larger than the sum of its proper divisors (1056815).

2121633 is an frugal number, since it uses more digits than its factorization.

2121633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8746 (or 8734 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2121633 is about 1456.5826444112. The cubic root of 2121633 is about 128.4961416375.

Adding to 2121633 its reverse (3361212), we get a palindrome (5482845).

The spelling of 2121633 in words is "two million, one hundred twenty-one thousand, six hundred thirty-three".