21222201200012 has 12 divisors (see below), whose sum is σ = 37608964152480. Its totient is φ = 10476782870736.

The previous prime is 21222201199999. The next prime is 21222201200017. The reversal of 21222201200012 is 21000210222212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21222201200017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33579431963 + ... + 33579432594.

It is an arithmetic number, because the mean of its divisors is an integer number (3134080346040).

Almost surely, 2^{21222201200012} is an apocalyptic number.

It is an amenable number.

21222201200012 is a deficient number, since it is larger than the sum of its proper divisors (16386762952468).

21222201200012 is a wasteful number, since it uses less digits than its factorization.

21222201200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67158864640 (or 67158864638 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222201200012 its reverse (21000210222212), we get a palindrome (42222411422224).

The spelling of 21222201200012 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, two hundred thousand, twelve".