10011121220 has 24 divisors (see below), whose sum is σ = 21937414464. Its totient is φ = 3830341856.

The previous prime is 10011121207. The next prime is 10011121229. The reversal of 10011121220 is 2212111001.

It is not an unprimeable number, because it can be changed into a prime (10011121229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10881194 + ... + 10882113.

It is an arithmetic number, because the mean of its divisors is an integer number (914058936).

Almost surely, 2^10011121220 is an apocalyptic number.

10011121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10011121220 is an abundant number, since it is smaller than the sum of its proper divisors (11926293244).

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

10011121220 is a wasteful number, since it uses less digits than its factorization.

10011121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21763339 (or 21763337 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10011121220 its reverse (2212111001), we get a palindrome (12223232221).

The spelling of 10011121220 in words is "ten billion, eleven million, one hundred twenty-one thousand, two hundred twenty".