2120111112220 has 24 divisors (see below), whose sum is σ = 4686561406800. Its totient is φ = 803410526592.

The previous prime is 2120111112191. The next prime is 2120111112263. The reversal of 2120111112220 is 222111110212.

It is a super-2 number, since 2×2120111112220² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2120111112194 and 2120111112203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2789619505 + ... + 2789620264.

It is an arithmetic number, because the mean of its divisors is an integer number (195273391950).

Almost surely, 2^{2120111112220} is an apocalyptic number.

2120111112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120111112220 is an abundant number, since it is smaller than the sum of its proper divisors (2566450294580).

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

2120111112220 is a wasteful number, since it uses less digits than its factorization.

2120111112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579239797 (or 5579239795 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2120111112220 its reverse (222111110212), we get a palindrome (2342222222432).

It can be divided in two parts, 212011 and 1112220, that added together give a palindrome (1324231).

The spelling of 2120111112220 in words is "two trillion, one hundred twenty billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty".