21223300412312 has 8 divisors (see below), whose sum is σ = 39793688273100. Its totient is φ = 10611650206152.

The previous prime is 21223300412269. The next prime is 21223300412317. The reversal of 21223300412312 is 21321400332212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223300412317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1326456275762 + ... + 1326456275777.

Almost surely, 2^{21223300412312} is an apocalyptic number.

It is an amenable number.

21223300412312 is a deficient number, since it is larger than the sum of its proper divisors (18570387860788).

21223300412312 is a wasteful number, since it uses less digits than its factorization.

21223300412312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652912551545 (or 2652912551541 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21223300412312 its reverse (21321400332212), we get a palindrome (42544700744524).

The spelling of 21223300412312 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred million, four hundred twelve thousand, three hundred twelve".