11221101221100 has 72 divisors (see below), whose sum is σ = 32673178605648. Its totient is φ = 2973234451200.

The previous prime is 11221101221069. The next prime is 11221101221107. The reversal of 11221101221100 is 112210112211.

It is a happy number.

It is a super-2 number, since 2×11221101221100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11221101221100.

It is not an unprimeable number, because it can be changed into a prime (11221101221107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119072871 + ... + 119167070.

Almost surely, 2^{11221101221100} is an apocalyptic number.

11221101221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221101221100 is an abundant number, since it is smaller than the sum of its proper divisors (21452077384548).

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

11221101221100 is a wasteful number, since it uses less digits than its factorization.

11221101221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238240115 (or 238240108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11221101221100 its reverse (112210112211), we get a palindrome (11333311333311).

The spelling of 11221101221100 in words is "eleven trillion, two hundred twenty-one billion, one hundred one million, two hundred twenty-one thousand, one hundred".