10111011220 has 12 divisors (see below), whose sum is σ = 21233123604. Its totient is φ = 4044404480.

The previous prime is 10111011217. The next prime is 10111011221. The reversal of 10111011220 is 2211011101.

It can be written as a sum of positive squares in 2 ways, for example, as 3742013584 + 6368997636 = 61172^2 + 79806^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10111011197 and 10111011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111011221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252775261 + ... + 252775300.

It is an arithmetic number, because the mean of its divisors is an integer number (1769426967).

Almost surely, 2^10111011220 is an apocalyptic number.

10111011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111011220 is an abundant number, since it is smaller than the sum of its proper divisors (11122112384).

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

10111011220 is a wasteful number, since it uses less digits than its factorization.

10111011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505550570 (or 505550568 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10111011220 its reverse (2211011101), we get a palindrome (12322022321).

The spelling of 10111011220 in words is "ten billion, one hundred eleven million, eleven thousand, two hundred twenty".