2111011221220 has 48 divisors (see below), whose sum is σ = 5120613324288. Its totient is φ = 722485122560.

The previous prime is 2111011221149. The next prime is 2111011221259. The reversal of 2111011221220 is 221221101112.

It is a super-2 number, since 2×2111011221220² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2111011221194 and 2111011221203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282217012 + ... + 282224491.

It is an arithmetic number, because the mean of its divisors is an integer number (106679444256).

Almost surely, 2^{2111011221220} is an apocalyptic number.

2111011221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111011221220 is an abundant number, since it is smaller than the sum of its proper divisors (3009602103068).

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

2111011221220 is a wasteful number, since it uses less digits than its factorization.

2111011221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564441540 (or 564441538 counting only the distinct ones).

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

Adding to 2111011221220 its reverse (221221101112), we get a palindrome (2332232322332).

The spelling of 2111011221220 in words is "two trillion, one hundred eleven billion, eleven million, two hundred twenty-one thousand, two hundred twenty".