1221200002012 has 48 divisors (see below), whose sum is σ = 2336059837440. Its totient is φ = 556083705600.

The previous prime is 1221200001979. The next prime is 1221200002031. The reversal of 1221200002012 is 2102000021221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221200001983 and 1221200002001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23522539 + ... + 23574397.

It is an arithmetic number, because the mean of its divisors is an integer number (48667913280).

Almost surely, 2^{1221200002012} is an apocalyptic number.

It is an amenable number.

1221200002012 is a deficient number, since it is larger than the sum of its proper divisors (1114859835428).

1221200002012 is a wasteful number, since it uses less digits than its factorization.

1221200002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63082 (or 63080 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1221200002012 its reverse (2102000021221), we get a palindrome (3323200023233).

The spelling of 1221200002012 in words is "one trillion, two hundred twenty-one billion, two hundred million, two thousand, twelve".