11200121020 has 48 divisors (see below), whose sum is σ = 25665939936. Its totient is φ = 4071584000.

The previous prime is 11200120991. The next prime is 11200121027. The reversal of 11200121020 is 2012100211.

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

It is a junction number, because it is equal to n+sod(n) for n = 11200120988 and 11200121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200121027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1179090 + ... + 1188550.

It is an arithmetic number, because the mean of its divisors is an integer number (534707082).

Almost surely, 2^11200121020 is an apocalyptic number.

11200121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11200121020 is an abundant number, since it is smaller than the sum of its proper divisors (14465818916).

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

11200121020 is a wasteful number, since it uses less digits than its factorization.

11200121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14862 (or 14860 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11200121020 its reverse (2012100211), we get a palindrome (13212221231).

The spelling of 11200121020 in words is "eleven billion, two hundred million, one hundred twenty-one thousand, twenty".