11012100120 has 128 divisors (see below), whose sum is σ = 41950886400. Its totient is φ = 2517049728.

The previous prime is 11012100119. The next prime is 11012100137. The reversal of 11012100120 is 2100121011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 720754 + ... + 735873.

It is an arithmetic number, because the mean of its divisors is an integer number (327741300).

Almost surely, 2^11012100120 is an apocalyptic number.

11012100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11012100120 is an abundant number, since it is smaller than the sum of its proper divisors (30938786280).

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

11012100120 is a wasteful number, since it uses less digits than its factorization.

11012100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456654 (or 1456644 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11012100120 its reverse (2100121011), we get a palindrome (13112221131).

The spelling of 11012100120 in words is "eleven billion, twelve million, one hundred thousand, one hundred twenty".