21344211212 has 12 divisors (see below), whose sum is σ = 39549567960. Its totient is φ = 10044334656.

The previous prime is 21344211199. The next prime is 21344211223. The reversal of 21344211212 is 21211244312.

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, 156942662 + ... + 156942797.

It is an arithmetic number, because the mean of its divisors is an integer number (3295797330).

Almost surely, 2^21344211212 is an apocalyptic number.

It is an amenable number.

21344211212 is a deficient number, since it is larger than the sum of its proper divisors (18205356748).

21344211212 is a wasteful number, since it uses less digits than its factorization.

21344211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313885480 (or 313885478 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

Adding to 21344211212 its reverse (21211244312), we get a palindrome (42555455524).

The spelling of 21344211212 in words is "twenty-one billion, three hundred forty-four million, two hundred eleven thousand, two hundred twelve".