1011122120 has 32 divisors (see below), whose sum is σ = 2353476600. Its totient is φ = 390501888.

The previous prime is 1011122017. The next prime is 1011122129. The reversal of 1011122120 is 212211101.

It can be written as a sum of positive squares in 4 ways, for example, as 793323556 + 217798564 = 28166^2 + 14758^2 .

It is not an unprimeable number, because it can be changed into a prime (1011122129) 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, 434669 + ... + 436988.

Almost surely, 2^1011122120 is an apocalyptic number.

1011122120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011122120 is an abundant number, since it is smaller than the sum of its proper divisors (1342354480).

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

1011122120 is a wasteful number, since it uses less digits than its factorization.

1011122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871697 (or 871693 counting only the distinct ones).

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

The square root of 1011122120 is about 31798.1464868630. The cubic root of 1011122120 is about 1003.6937130191.

Adding to 1011122120 its reverse (212211101), we get a palindrome (1223333221).

The spelling of 1011122120 in words is "one billion, eleven million, one hundred twenty-two thousand, one hundred twenty".