1221203012 has 12 divisors (see below), whose sum is σ = 2147235216. Its totient is φ = 607707240.

The previous prime is 1221202951. The next prime is 1221203059. The reversal of 1221203012 is 2103021221.

It is a happy 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, 722618 + ... + 724305.

It is an arithmetic number, because the mean of its divisors is an integer number (178936268).

Almost surely, 2^1221203012 is an apocalyptic number.

It is an amenable number.

1221203012 is a deficient number, since it is larger than the sum of its proper divisors (926032204).

1221203012 is a wasteful number, since it uses less digits than its factorization.

1221203012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447138 (or 1447136 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1221203012 is about 34945.7152166042. The cubic root of 1221203012 is about 1068.8808317338.

Adding to 1221203012 its reverse (2103021221), we get a palindrome (3324224233).

The spelling of 1221203012 in words is "one billion, two hundred twenty-one million, two hundred three thousand, twelve".