2121121221003 has 12 divisors (see below), whose sum is σ = 3065394674160. Its totient is φ = 1413364086096.

The previous prime is 2121121220987. The next prime is 2121121221047. The reversal of 2121121221003 is 3001221211212.

It is not a de Polignac number, because 2121121221003 - 2⁴ = 2121121220987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121121221103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59708583 + ... + 59744096.

It is an arithmetic number, because the mean of its divisors is an integer number (255449556180).

Almost surely, 2^{2121121221003} is an apocalyptic number.

2121121221003 is a deficient number, since it is larger than the sum of its proper divisors (944273453157).

2121121221003 is a wasteful number, since it uses less digits than its factorization.

2121121221003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119454658 (or 119454655 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2121121221003 its reverse (3001221211212), we get a palindrome (5122342432215).

The spelling of 2121121221003 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, three".