2121023170 has 32 divisors (see below), whose sum is σ = 4513708800. Its totient is φ = 702131136.

The previous prime is 2121023167. The next prime is 2121023171. The reversal of 2121023170 is 713201212.

It is not an unprimeable number, because it can be changed into a prime (2121023171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520390 + ... + 524449.

It is an arithmetic number, because the mean of its divisors is an integer number (141053400).

Almost surely, 2^2121023170 is an apocalyptic number.

2121023170 is an abundant number, since it is smaller than the sum of its proper divisors (2392685630).

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

2121023170 is a wasteful number, since it uses less digits than its factorization.

2121023170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044882.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 2121023170 is about 46054.5673087914. The cubic root of 2121023170 is about 1284.8382906017.

Adding to 2121023170 its reverse (713201212), we get a palindrome (2834224382).

The spelling of 2121023170 in words is "two billion, one hundred twenty-one million, twenty-three thousand, one hundred seventy".