11121211101220 has 48 divisors (see below), whose sum is σ = 25481745672768. Its totient is φ = 4043431992960.

The previous prime is 11121211101193. The next prime is 11121211101227. The reversal of 11121211101220 is 2210111212111.

It is a junction number, because it is equal to n+sod(n) for n = 11121211101194 and 11121211101203.

It is not an unprimeable number, because it can be changed into a prime (11121211101227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2645742 + ... + 5407621.

It is an arithmetic number, because the mean of its divisors is an integer number (530869701516).

Almost surely, 2^{11121211101220} is an apocalyptic number.

11121211101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121211101220 is an abundant number, since it is smaller than the sum of its proper divisors (14360534571548).

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

11121211101220 is a wasteful number, since it uses less digits than its factorization.

11121211101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8059660 (or 8059658 counting only the distinct ones).

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

Adding to 11121211101220 its reverse (2210111212111), we get a palindrome (13331322313331).

The spelling of 11121211101220 in words is "eleven trillion, one hundred twenty-one billion, two hundred eleven million, one hundred one thousand, two hundred twenty".