12221021012 has 12 divisors (see below), whose sum is σ = 21409814580. Its totient is φ = 6103931136.

The previous prime is 12221020969. The next prime is 12221021053. The reversal of 12221021012 is 21012012221.

It can be written as a sum of positive squares in 2 ways, for example, as 452242756 + 11768778256 = 21266^2 + 108484^2 .

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, 1640663 + ... + 1648094.

It is an arithmetic number, because the mean of its divisors is an integer number (1784151215).

Almost surely, 2^12221021012 is an apocalyptic number.

It is an amenable number.

12221021012 is a deficient number, since it is larger than the sum of its proper divisors (9188793568).

12221021012 is a wasteful number, since it uses less digits than its factorization.

12221021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289690 (or 3289688 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12221021012 its reverse (21012012221), we get a palindrome (33233033233).

The spelling of 12221021012 in words is "twelve billion, two hundred twenty-one million, twenty-one thousand, twelve".