2121260016 has 40 divisors (see below), whose sum is σ = 5768341120. Its totient is φ = 669871296.

The previous prime is 2121260003. The next prime is 2121260081. The reversal of 2121260016 is 6100621212.

It is a junction number, because it is equal to n+sod(n) for n = 2121259974 and 2121260001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1162060 + ... + 1163883.

It is an arithmetic number, because the mean of its divisors is an integer number (144208528).

Almost surely, 2^2121260016 is an apocalyptic number.

It is an amenable number.

2121260016 is an abundant number, since it is smaller than the sum of its proper divisors (3647081104).

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

2121260016 is a wasteful number, since it uses less digits than its factorization.

2121260016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325973 (or 2325967 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2121260016 is about 46057.1385997871. The cubic root of 2121260016 is about 1284.8861130375.

Adding to 2121260016 its reverse (6100621212), we get a palindrome (8221881228).

The spelling of 2121260016 in words is "two billion, one hundred twenty-one million, two hundred sixty thousand, sixteen".