21021201222003 has 24 divisors (see below), whose sum is σ = 30937193323920. Its totient is φ = 13749569346240.

The previous prime is 21021201221987. The next prime is 21021201222013. The reversal of 21021201222003 is 30022210212012.

It is not a de Polignac number, because 21021201222003 - 2⁴ = 21021201221987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21021201222013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61046968 + ... + 61390346.

It is an arithmetic number, because the mean of its divisors is an integer number (1289049721830).

Almost surely, 2^{21021201222003} is an apocalyptic number.

21021201222003 is a deficient number, since it is larger than the sum of its proper divisors (9915992101917).

21021201222003 is a wasteful number, since it uses less digits than its factorization.

21021201222003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471779 (or 471776 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21021201222003 its reverse (30022210212012), we get a palindrome (51043411434015).

The spelling of 21021201222003 in words is "twenty-one trillion, twenty-one billion, two hundred one million, two hundred twenty-two thousand, three".