2121661010 has 32 divisors (see below), whose sum is σ = 4377559680. Its totient is φ = 725260032.

The previous prime is 2121661007. The next prime is 2121661027. The reversal of 2121661010 is 101661212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21380 + ... + 68559.

It is an arithmetic number, because the mean of its divisors is an integer number (136798740).

Almost surely, 2^2121661010 is an apocalyptic number.

2121661010 is an abundant number, since it is smaller than the sum of its proper divisors (2255898670).

2121661010 is a wasteful number, since it uses less digits than its factorization.

2121661010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90290.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2121661010 is about 46061.4916171850. The cubic root of 2121661010 is about 1284.9670710775.

The spelling of 2121661010 in words is "two billion, one hundred twenty-one million, six hundred sixty-one thousand, ten".