21120211221232 has 40 divisors (see below), whose sum is σ = 41908516035984. Its totient is φ = 10307175051264.

The previous prime is 21120211221199. The next prime is 21120211221233. The reversal of 21120211221232 is 23212211202112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120211221233) 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, 64359418 + ... + 64686745.

Almost surely, 2^{21120211221232} is an apocalyptic number.

It is an amenable number.

21120211221232 is a deficient number, since it is larger than the sum of its proper divisors (20788304814752).

21120211221232 is a wasteful number, since it uses less digits than its factorization.

21120211221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129046417 (or 129046411 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21120211221232 its reverse (23212211202112), we get a palindrome (44332422423344).

The spelling of 21120211221232 in words is "twenty-one trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand, two hundred thirty-two".