1220101221200 has 60 divisors (see below), whose sum is σ = 2950966436700. Its totient is φ = 484765025280.

The previous prime is 1220101221169. The next prime is 1220101221203. The reversal of 1220101221200 is 21221010221.

It can be written as a sum of positive squares in 6 ways, for example, as 15744226576 + 1204356994624 = 125476^2 + 1097432^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220101221203) 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, 10176149 + ... + 10295348.

It is an arithmetic number, because the mean of its divisors is an integer number (49182773945).

Almost surely, 2^{1220101221200} is an apocalyptic number.

1220101221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220101221200 is an abundant number, since it is smaller than the sum of its proper divisors (1730865215500).

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

1220101221200 is a wasteful number, since it uses less digits than its factorization.

1220101221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20471664 (or 20471653 counting only the distinct ones).

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

Adding to 1220101221200 its reverse (21221010221), we get a palindrome (1241322231421).

The spelling of 1220101221200 in words is "one trillion, two hundred twenty billion, one hundred one million, two hundred twenty-one thousand, two hundred".