2111320121220 has 72 divisors (see below), whose sum is σ = 6404616568896. Its totient is φ = 562994183232.

The previous prime is 2111320121201. The next prime is 2111320121269. The reversal of 2111320121220 is 221210231112.

2111320121220 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 320 + 121 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2111320121193 and 2111320121202.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4095219 + ... + 4581861.

Almost surely, 2^{2111320121220} is an apocalyptic number.

2111320121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111320121220 is an abundant number, since it is smaller than the sum of its proper divisors (4293296447676).

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

2111320121220 is a wasteful number, since it uses less digits than its factorization.

2111320121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510761 (or 510756 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2111320121220 its reverse (221210231112), we get a palindrome (2332530352332).

The spelling of 2111320121220 in words is "two trillion, one hundred eleven billion, three hundred twenty million, one hundred twenty-one thousand, two hundred twenty".