2121140121 has 8 divisors (see below), whose sum is σ = 2831626560. Its totient is φ = 1412373552.

The previous prime is 2121140117. The next prime is 2121140141. The reversal of 2121140121 is 1210411212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121140121 - 2² = 2121140117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121140121.

It is not an unprimeable number, because it can be changed into a prime (2121140141) 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, 427086 + ... + 432023.

It is an arithmetic number, because the mean of its divisors is an integer number (353953320).

Almost surely, 2^2121140121 is an apocalyptic number.

It is an amenable number.

2121140121 is a deficient number, since it is larger than the sum of its proper divisors (710486439).

2121140121 is an equidigital number, since it uses as much as digits as its factorization.

2121140121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859935.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 2121140121 is about 46055.8369916344. The cubic root of 2121140121 is about 1284.8619050477.

Adding to 2121140121 its reverse (1210411212), we get a palindrome (3331551333).

The spelling of 2121140121 in words is "two billion, one hundred twenty-one million, one hundred forty thousand, one hundred twenty-one".