12021043346 has 12 divisors (see below), whose sum is σ = 19525304682. Its totient is φ = 5548173696.

The previous prime is 12021043303. The next prime is 12021043369. The reversal of 12021043346 is 64334012021.

It can be written as a sum of positive squares in 3 ways, for example, as 5603271025 + 6417772321 = 74855^2 + 80111^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17782271 + ... + 17782946.

Almost surely, 2^12021043346 is an apocalyptic number.

12021043346 is a deficient number, since it is larger than the sum of its proper divisors (7504261336).

12021043346 is a wasteful number, since it uses less digits than its factorization.

12021043346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35565245 (or 35565232 counting only the distinct ones).

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

Adding to 12021043346 its reverse (64334012021), we get a palindrome (76355055367).

The spelling of 12021043346 in words is "twelve billion, twenty-one million, forty-three thousand, three hundred forty-six".