2111201211220 has 24 divisors (see below), whose sum is σ = 4435153228800. Its totient is φ = 844169877792.

The previous prime is 2111201211211. The next prime is 2111201211257. The reversal of 2111201211220 is 221121021112.

It is a super-3 number, since 3×2111201211220³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2111201211194 and 2111201211203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19357180 + ... + 19465939.

It is an arithmetic number, because the mean of its divisors is an integer number (184798051200).

Almost surely, 2^{2111201211220} is an apocalyptic number.

2111201211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111201211220 is an abundant number, since it is smaller than the sum of its proper divisors (2323952017580).

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

2111201211220 is a wasteful number, since it uses less digits than its factorization.

2111201211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38825847 (or 38825845 counting only the distinct ones).

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

Adding to 2111201211220 its reverse (221121021112), we get a palindrome (2332322232332).

The spelling of 2111201211220 in words is "two trillion, one hundred eleven billion, two hundred one million, two hundred eleven thousand, two hundred twenty".