12221012996 has 6 divisors (see below), whose sum is σ = 21386772750. Its totient is φ = 6110506496.

The previous prime is 12221012987. The next prime is 12221013031. The reversal of 12221012996 is 69921012221.

It can be written as a sum of positive squares in only one way, i.e., 7471873600 + 4749139396 = 86440^2 + 68914^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1527626621 + ... + 1527626628.

It is an arithmetic number, because the mean of its divisors is an integer number (3564462125).

Almost surely, 2^12221012996 is an apocalyptic number.

It is an amenable number.

12221012996 is a deficient number, since it is larger than the sum of its proper divisors (9165759754).

12221012996 is a wasteful number, since it uses less digits than its factorization.

12221012996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055253253 (or 3055253251 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 12221012996 in words is "twelve billion, two hundred twenty-one million, twelve thousand, nine hundred ninety-six".