2121400242003 has 16 divisors (see below), whose sum is σ = 3238212354560. Its totient is φ = 1210127786496.

The previous prime is 2121400241977. The next prime is 2121400242019. The reversal of 2121400242003 is 3002420041212.

It is a de Polignac number, because none of the positive numbers 2^k-2121400242003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121400242053) 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, 87526063 + ... + 87550296.

It is an arithmetic number, because the mean of its divisors is an integer number (202388272160).

Almost surely, 2^{2121400242003} is an apocalyptic number.

2121400242003 is a deficient number, since it is larger than the sum of its proper divisors (1116812112557).

2121400242003 is a wasteful number, since it uses less digits than its factorization.

2121400242003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175076946.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 2121400242003 its reverse (3002420041212), we get a palindrome (5123820283215).

The spelling of 2121400242003 in words is "two trillion, one hundred twenty-one billion, four hundred million, two hundred forty-two thousand, three".