821229363412 has 12 divisors (see below), whose sum is σ = 1439020248820. Its totient is φ = 410080720896.

The previous prime is 821229363407. The next prime is 821229363439. The reversal of 821229363412 is 214363922128.

821229363412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 643823292996 + 177406070416 = 802386^2 + 421196^2 .

It is a congruent number.

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, 133486743 + ... + 133492894.

Almost surely, 2^821229363412 is an apocalyptic number.

It is an amenable number.

821229363412 is a deficient number, since it is larger than the sum of its proper divisors (617790885408).

821229363412 is a wasteful number, since it uses less digits than its factorization.

821229363412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266980410 (or 266980408 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The spelling of 821229363412 in words is "eight hundred twenty-one billion, two hundred twenty-nine million, three hundred sixty-three thousand, four hundred twelve".