1011022011220 has 48 divisors (see below), whose sum is σ = 2288512790928. Its totient is φ = 372966128640.

The previous prime is 1011022011199. The next prime is 1011022011253. The reversal of 1011022011220 is 221102201101.

It can be written as a sum of positive squares in 8 ways, for example, as 521047210896 + 489974800324 = 721836^2 + 699982^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 1011022011220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1450201 + ... + 2031040.

It is an arithmetic number, because the mean of its divisors is an integer number (47677349811).

Almost surely, 2^{1011022011220} is an apocalyptic number.

1011022011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011022011220 is an abundant number, since it is smaller than the sum of its proper divisors (1277490779708).

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

1011022011220 is a wasteful number, since it uses less digits than its factorization.

1011022011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482380 (or 3482378 counting only the distinct ones).

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

Adding to 1011022011220 its reverse (221102201101), we get a palindrome (1232124212321).

The spelling of 1011022011220 in words is "one trillion, eleven billion, twenty-two million, eleven thousand, two hundred twenty".