2121244004 has 24 divisors (see below), whose sum is σ = 4050915456. Its totient is φ = 963900000.

The previous prime is 2121243989. The next prime is 2121244007. The reversal of 2121244004 is 4004421212.

It is a super-2 number, since 2×2121244004² = 8999352249011904032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121244007) 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, 196754 + ... + 207254.

It is an arithmetic number, because the mean of its divisors is an integer number (168788144).

Almost surely, 2^2121244004 is an apocalyptic number.

It is an amenable number.

2121244004 is a deficient number, since it is larger than the sum of its proper divisors (1929671452).

2121244004 is a wasteful number, since it uses less digits than its factorization.

2121244004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15107 (or 15105 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2121244004 is about 46056.9647718996. The cubic root of 2121244004 is about 1284.8828801087.

Adding to 2121244004 its reverse (4004421212), we get a palindrome (6125665216).

The spelling of 2121244004 in words is "two billion, one hundred twenty-one million, two hundred forty-four thousand, four".