11211220104 has 128 divisors (see below), whose sum is σ = 33784857600. Its totient is φ = 3028596480.

The previous prime is 11211220099. The next prime is 11211220109. The reversal of 11211220104 is 40102211211.

It is an interprime number because it is at equal distance from previous prime (11211220099) and next prime (11211220109).

It is not an unprimeable number, because it can be changed into a prime (11211220109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1742814 + ... + 1749234.

It is an arithmetic number, because the mean of its divisors is an integer number (263944200).

Almost surely, 2^11211220104 is an apocalyptic number.

11211220104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11211220104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16892428800).

11211220104 is an abundant number, since it is smaller than the sum of its proper divisors (22573637496).

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

11211220104 is a wasteful number, since it uses less digits than its factorization.

11211220104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7003 (or 6999 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11211220104 its reverse (40102211211), we get a palindrome (51313431315).

The spelling of 11211220104 in words is "eleven billion, two hundred eleven million, two hundred twenty thousand, one hundred four".