1221230200312 has 32 divisors (see below), whose sum is σ = 2294893814400. Its totient is φ = 609258861184.

The previous prime is 1221230200279. The next prime is 1221230200339. The reversal of 1221230200312 is 2130020321221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221230200312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37065798 + ... + 37098730.

It is an arithmetic number, because the mean of its divisors is an integer number (71715431700).

Almost surely, 2^{1221230200312} is an apocalyptic number.

It is an amenable number.

1221230200312 is a deficient number, since it is larger than the sum of its proper divisors (1073663614088).

1221230200312 is a wasteful number, since it uses less digits than its factorization.

1221230200312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43095 (or 43091 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1221230200312 its reverse (2130020321221), we get a palindrome (3351250521533).

The spelling of 1221230200312 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, two hundred thousand, three hundred twelve".