2211111021220 has 48 divisors (see below), whose sum is σ = 4751683630848. Its totient is φ = 863809390080.

The previous prime is 2211111021209. The next prime is 2211111021271. The reversal of 2211111021220 is 221201111122.

It is a junction number, because it is equal to n+sod(n) for n = 2211111021194 and 2211111021203.

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 15 ways as a sum of consecutive naturals, for example, 11919580 + ... + 12103660.

It is an arithmetic number, because the mean of its divisors is an integer number (98993408976).

Almost surely, 2^{2211111021220} is an apocalyptic number.

2211111021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211111021220 is an abundant number, since it is smaller than the sum of its proper divisors (2540572609628).

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

2211111021220 is a wasteful number, since it uses less digits than its factorization.

2211111021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198100 (or 198098 counting only the distinct ones).

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

Adding to 2211111021220 its reverse (221201111122), we get a palindrome (2432312132342).

The spelling of 2211111021220 in words is "two trillion, two hundred eleven billion, one hundred eleven million, twenty-one thousand, two hundred twenty".