1220211102120 has 32 divisors (see below), whose sum is σ = 3660633306720. Its totient is φ = 325389627200.

The previous prime is 1220211102109. The next prime is 1220211102127. The reversal of 1220211102120 is 212011120221.

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 1220211102120.

It is not an unprimeable number, because it can be changed into a prime (1220211102127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5084212806 + ... + 5084213045.

It is an arithmetic number, because the mean of its divisors is an integer number (114394790835).

Almost surely, 2^{1220211102120} is an apocalyptic number.

1220211102120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220211102120 is an abundant number, since it is smaller than the sum of its proper divisors (2440422204600).

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

1220211102120 is a wasteful number, since it uses less digits than its factorization.

1220211102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10168425865 (or 10168425861 counting only the distinct ones).

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

Adding to 1220211102120 its reverse (212011120221), we get a palindrome (1432222222341).

The spelling of 1220211102120 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred two thousand, one hundred twenty".