21223212201 has 12 divisors (see below), whose sum is σ = 30839320512. Its totient is φ = 14064083736.

The previous prime is 21223212037. The next prime is 21223212203. The reversal of 21223212201 is 10221232212.

21223212201 is a `hidden beast` number, since 2 + 122 + 321 + 220 + 1 = 666.

It is not a de Polignac number, because 21223212201 - 2¹⁵ = 21223179433 is a prime.

It is a super-2 number, since 2×21223212201² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21223212203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7058781 + ... + 7061786.

It is an arithmetic number, because the mean of its divisors is an integer number (2569943376).

Almost surely, 2^21223212201 is an apocalyptic number.

It is an amenable number.

21223212201 is a deficient number, since it is larger than the sum of its proper divisors (9616108311).

21223212201 is a wasteful number, since it uses less digits than its factorization.

21223212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14120740 (or 14120737 counting only the distinct ones).

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

Adding to 21223212201 its reverse (10221232212), we get a palindrome (31444444413).

The spelling of 21223212201 in words is "twenty-one billion, two hundred twenty-three million, two hundred twelve thousand, two hundred one".