1221210200012 has 24 divisors (see below), whose sum is σ = 2331569031120. Its totient is φ = 555055607360.

The previous prime is 1221210200003. The next prime is 1221210200047. The reversal of 1221210200012 is 2100020121221.

It is a super-2 number, since 2×1221210200012² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221210200012.

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, 375587 + ... + 1607322.

It is an arithmetic number, because the mean of its divisors is an integer number (97148709630).

Almost surely, 2^{1221210200012} is an apocalyptic number.

It is an amenable number.

1221210200012 is a deficient number, since it is larger than the sum of its proper divisors (1110358831108).

1221210200012 is a wasteful number, since it uses less digits than its factorization.

1221210200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996921 (or 1996919 counting only the distinct ones).

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

Adding to 1221210200012 its reverse (2100020121221), we get a palindrome (3321230321233).

The spelling of 1221210200012 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, two hundred thousand, twelve".