11111220010 has 16 divisors (see below), whose sum is σ = 21818395872. Its totient is φ = 4040443600.

The previous prime is 11111219971. The next prime is 11111220013. The reversal of 11111220010 is 1002211111.

It is a super-2 number, since 2×11111220010² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (11111220013) 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, 50505436 + ... + 50505655.

It is an arithmetic number, because the mean of its divisors is an integer number (1363649742).

Almost surely, 2^11111220010 is an apocalyptic number.

11111220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111220010 is a deficient number, since it is larger than the sum of its proper divisors (10707175862).

11111220010 is a wasteful number, since it uses less digits than its factorization.

11111220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101011109.

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

Adding to 11111220010 its reverse (1002211111), we get a palindrome (12113431121).

The spelling of 11111220010 in words is "eleven billion, one hundred eleven million, two hundred twenty thousand, ten".