2121231202103 has 4 divisors (see below), whose sum is σ = 2284402833048. Its totient is φ = 1958059571160.

The previous prime is 2121231202081. The next prime is 2121231202117. The reversal of 2121231202103 is 3012021321212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121231202103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121231202403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81585815453 + ... + 81585815478.

It is an arithmetic number, because the mean of its divisors is an integer number (571100708262).

Almost surely, 2^{2121231202103} is an apocalyptic number.

2121231202103 is a deficient number, since it is larger than the sum of its proper divisors (163171630945).

2121231202103 is a wasteful number, since it uses less digits than its factorization.

2121231202103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163171630944.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2121231202103 its reverse (3012021321212), we get a palindrome (5133252523315).

The spelling of 2121231202103 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-one million, two hundred two thousand, one hundred three".