1221201201120 has 96 divisors (see below), whose sum is σ = 3850487746560. Its totient is φ = 325340090880.

The previous prime is 1221201201097. The next prime is 1221201201161. The reversal of 1221201201120 is 211021021221.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1221201201120.

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, 725616 + ... + 1723055.

It is an arithmetic number, because the mean of its divisors is an integer number (40109247360).

Almost surely, 2^{1221201201120} is an apocalyptic number.

1221201201120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221201201120 is an abundant number, since it is smaller than the sum of its proper divisors (2629286545440).

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

1221201201120 is a wasteful number, since it uses less digits than its factorization.

1221201201120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449728 (or 2449720 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221201201120 its reverse (211021021221), we get a palindrome (1432222222341).

The spelling of 1221201201120 in words is "one trillion, two hundred twenty-one billion, two hundred one million, two hundred one thousand, one hundred twenty".