1221210201200 has 60 divisors (see below), whose sum is σ = 3200680929768. Its totient is φ = 444076435200.

The previous prime is 1221210201091. The next prime is 1221210201203. The reversal of 1221210201200 is 21020121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221210201203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138769487 + ... + 138778286.

Almost surely, 2^{1221210201200} is an apocalyptic number.

1221210201200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221210201200 is an abundant number, since it is smaller than the sum of its proper divisors (1979470728568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221210201200 is a wasteful number, since it uses less digits than its factorization.

1221210201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277547802 (or 277547791 counting only the distinct ones).

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

Adding to 1221210201200 its reverse (21020121221), we get a palindrome (1242230322421).

It can be divided in two parts, 12 and 21210201200, that added together give a palindrome (21210201212).

The spelling of 1221210201200 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, two hundred one thousand, two hundred".