11122211201220 has 144 divisors (see below), whose sum is σ = 39886550645760. Its totient is φ = 2454556946688.

The previous prime is 11122211201207. The next prime is 11122211201261. The reversal of 11122211201220 is 2210211222111.

11122211201220 is a `hidden beast` number, since 1 + 11 + 22 + 211 + 201 + 220 = 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 = 11122211201193 and 11122211201202.

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, 152155732 + ... + 152228811.

It is an arithmetic number, because the mean of its divisors is an integer number (276989935040).

Almost surely, 2^{11122211201220} is an apocalyptic number.

11122211201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11122211201220 is an abundant number, since it is smaller than the sum of its proper divisors (28764339444540).

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

11122211201220 is a wasteful number, since it uses less digits than its factorization.

11122211201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304384594 (or 304384589 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11122211201220 its reverse (2210211222111), we get a palindrome (13332422423331).

It can be divided in two parts, 1112221 and 1201220, that added together give a 4-th power (2313441 = 39⁴).

The spelling of 11122211201220 in words is "eleven trillion, one hundred twenty-two billion, two hundred eleven million, two hundred one thousand, two hundred twenty".