11111001220100 has 72 divisors (see below), whose sum is σ = 25380742611840. Its totient is φ = 4210339236480.

The previous prime is 11111001220097. The next prime is 11111001220147. The reversal of 11111001220100 is 102210011111.

It is a super-2 number, since 2×11111001220100² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66460214 + ... + 66627186.

Almost surely, 2^{11111001220100} is an apocalyptic number.

11111001220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111001220100 is an abundant number, since it is smaller than the sum of its proper divisors (14269741391740).

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

11111001220100 is a wasteful number, since it uses less digits than its factorization.

11111001220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202029 (or 202022 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11111001220100 its reverse (102210011111), we get a palindrome (11213211231211).

The spelling of 11111001220100 in words is "eleven trillion, one hundred eleven billion, one million, two hundred twenty thousand, one hundred".