2111221100120 has 64 divisors (see below), whose sum is σ = 5182721690400. Its totient is φ = 767622906880.

The previous prime is 2111221100101. The next prime is 2111221100123. The reversal of 2111221100120 is 210011221112.

It is a junction number, because it is equal to n+sod(n) for n = 2111221100095 and 2111221100104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111221100123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3361526 + ... + 3939834.

Almost surely, 2^{2111221100120} is an apocalyptic number.

2111221100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111221100120 is an abundant number, since it is smaller than the sum of its proper divisors (3071500590280).

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

2111221100120 is a wasteful number, since it uses less digits than its factorization.

2111221100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586628 (or 586624 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2111221100120 its reverse (210011221112), we get a palindrome (2321232321232).

The spelling of 2111221100120 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, one hundred thousand, one hundred twenty".