21103332212 has 24 divisors (see below), whose sum is σ = 38213226240. Its totient is φ = 10186894080.

The previous prime is 21103332193. The next prime is 21103332233. The reversal of 21103332212 is 21223330112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151133 + ... + 255044.

It is an arithmetic number, because the mean of its divisors is an integer number (1592217760).

Almost surely, 2^21103332212 is an apocalyptic number.

It is an amenable number.

21103332212 is a deficient number, since it is larger than the sum of its proper divisors (17109894028).

21103332212 is a wasteful number, since it uses less digits than its factorization.

21103332212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406631 (or 406629 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21103332212 its reverse (21223330112), we get a palindrome (42326662324).

The spelling of 21103332212 in words is "twenty-one billion, one hundred three million, three hundred thirty-two thousand, two hundred twelve".