2121240104 has 16 divisors (see below), whose sum is σ = 4186658400. Its totient is φ = 1004797872.

The previous prime is 2121240103. The next prime is 2121240133. The reversal of 2121240104 is 4010421212.

It is not an unprimeable number, because it can be changed into a prime (2121240101) 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, 6977612 + ... + 6977915.

It is an arithmetic number, because the mean of its divisors is an integer number (261666150).

Almost surely, 2^2121240104 is an apocalyptic number.

It is an amenable number.

2121240104 is a deficient number, since it is larger than the sum of its proper divisors (2065418296).

2121240104 is a wasteful number, since it uses less digits than its factorization.

2121240104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13955552 (or 13955548 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2121240104 is about 46056.9224330067. The cubic root of 2121240104 is about 1284.8820926704.

Adding to 2121240104 its reverse (4010421212), we get a palindrome (6131661316).

It can be divided in two parts, 21212 and 40104, that added together give a palindrome (61316).

The spelling of 2121240104 in words is "two billion, one hundred twenty-one million, two hundred forty thousand, one hundred four".