2121201020144 has 40 divisors (see below), whose sum is σ = 4135357948128. Its totient is φ = 1054029957120.

The previous prime is 2121201020143. The next prime is 2121201020177. The reversal of 2121201020144 is 4410201021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121201020143) 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, 1313084 + ... + 2442660.

Almost surely, 2^{2121201020144} is an apocalyptic number.

It is an amenable number.

2121201020144 is a deficient number, since it is larger than the sum of its proper divisors (2014156927984).

2121201020144 is a wasteful number, since it uses less digits than its factorization.

2121201020144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130313 (or 1130307 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2121201020144 its reverse (4410201021212), we get a palindrome (6531402041356).

The spelling of 2121201020144 in words is "two trillion, one hundred twenty-one billion, two hundred one million, twenty thousand, one hundred forty-four".