21211122220012 has 12 divisors (see below), whose sum is σ = 37190438007016. Its totient is φ = 10585282789440.

The previous prime is 21211122220003. The next prime is 21211122220033. The reversal of 21211122220012 is 21002222111212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5069577789 + ... + 5069581972.

Almost surely, 2^{21211122220012} is an apocalyptic number.

It is an amenable number.

21211122220012 is a deficient number, since it is larger than the sum of its proper divisors (15979315787004).

21211122220012 is a wasteful number, since it uses less digits than its factorization.

21211122220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10139160288 (or 10139160286 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21211122220012 its reverse (21002222111212), we get a palindrome (42213344331224).

The spelling of 21211122220012 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred twenty thousand, twelve".