21202221003 has 8 divisors (see below), whose sum is σ = 29181551616. Its totient is φ = 13678852200.

The previous prime is 21202220993. The next prime is 21202221017. The reversal of 21202221003 is 30012220212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21202221003 - 2⁴ = 21202220987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202221503) 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, 113990343 + ... + 113990528.

It is an arithmetic number, because the mean of its divisors is an integer number (3647693952).

Almost surely, 2^21202221003 is an apocalyptic number.

21202221003 is a deficient number, since it is larger than the sum of its proper divisors (7979330613).

21202221003 is a wasteful number, since it uses less digits than its factorization.

21202221003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227980905.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21202221003 its reverse (30012220212), we get a palindrome (51214441215).

The spelling of 21202221003 in words is "twenty-one billion, two hundred two million, two hundred twenty-one thousand, three".