2121181270 has 16 divisors (see below), whose sum is σ = 4111828560. Its totient is φ = 783205344.

The previous prime is 2121181259. The next prime is 2121181277. The reversal of 2121181270 is 721811212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121181277) 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, 8158260 + ... + 8158519.

It is an arithmetic number, because the mean of its divisors is an integer number (256989285).

Almost surely, 2^2121181270 is an apocalyptic number.

2121181270 is a deficient number, since it is larger than the sum of its proper divisors (1990647290).

2121181270 is a wasteful number, since it uses less digits than its factorization.

2121181270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16316799.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 2121181270 is about 46056.2837189455. The cubic root of 2121181270 is about 1284.8702135418.

Adding to 2121181270 its reverse (721811212), we get a palindrome (2842992482).

The spelling of 2121181270 in words is "two billion, one hundred twenty-one million, one hundred eighty-one thousand, two hundred seventy".