11120021001220 has 24 divisors (see below), whose sum is σ = 23921606155608. Its totient is φ = 4339520390400.

The previous prime is 11120021001197. The next prime is 11120021001283. The reversal of 11120021001220 is 2210012002111.

It can be written as a sum of positive squares in 4 ways, for example, as 330201935424 + 10789819065796 = 574632^2 + 3284786^2 .

It is a super-3 number, since 3×11120021001220³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11120021001220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6780499791 + ... + 6780501430.

It is an arithmetic number, because the mean of its divisors is an integer number (996733589817).

Almost surely, 2^{11120021001220} is an apocalyptic number.

11120021001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11120021001220 is an abundant number, since it is smaller than the sum of its proper divisors (12801585154388).

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

11120021001220 is a wasteful number, since it uses less digits than its factorization.

11120021001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13561001271 (or 13561001269 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11120021001220 its reverse (2210012002111), we get a palindrome (13330033003331).

The spelling of 11120021001220 in words is "eleven trillion, one hundred twenty billion, twenty-one million, one thousand, two hundred twenty".