21203003211 has 16 divisors (see below), whose sum is σ = 32236241184. Its totient is φ = 12280472064.

The previous prime is 21203003201. The next prime is 21203003219. The reversal of 21203003211 is 11230030212.

It is not a de Polignac number, because 21203003211 - 2⁶ = 21203003147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21203003219) 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, 15989536 + ... + 15990861.

It is an arithmetic number, because the mean of its divisors is an integer number (2014765074).

Almost surely, 2^21203003211 is an apocalyptic number.

21203003211 is a deficient number, since it is larger than the sum of its proper divisors (11033237973).

21203003211 is a wasteful number, since it uses less digits than its factorization.

21203003211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31980430.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21203003211 its reverse (11230030212), we get a palindrome (32433033423).

The spelling of 21203003211 in words is "twenty-one billion, two hundred three million, three thousand, two hundred eleven".