2111022221220 has 144 divisors (see below), whose sum is σ = 7007884595712. Its totient is φ = 510127787520.

The previous prime is 2111022221177. The next prime is 2111022221293. The reversal of 2111022221220 is 221222201112.

It is a happy number.

2111022221220 is a `hidden beast` number, since 211 + 1 + 0 + 222 + 212 + 20 = 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 = 2111022221193 and 2111022221202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1083412 + ... + 2322891.

It is an arithmetic number, because the mean of its divisors is an integer number (48665865248).

Almost surely, 2^{2111022221220} is an apocalyptic number.

2111022221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111022221220 is an abundant number, since it is smaller than the sum of its proper divisors (4896862374492).

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

2111022221220 is a wasteful number, since it uses less digits than its factorization.

2111022221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406642 (or 3406637 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2111022221220 its reverse (221222201112), we get a palindrome (2332244422332).

The spelling of 2111022221220 in words is "two trillion, one hundred eleven billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty".