11100401020 has 24 divisors (see below), whose sum is σ = 23385330864. Its totient is φ = 4425972096.

The previous prime is 11100400999. The next prime is 11100401029. The reversal of 11100401020 is 2010400111.

It is a super-3 number, since 3×11100401020³ (a number of 31 digits) contains 333 as substring.

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 = 11100400988 and 11100401006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100401029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880354 + ... + 892873.

It is an arithmetic number, because the mean of its divisors is an integer number (974388786).

Almost surely, 2^11100401020 is an apocalyptic number.

11100401020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11100401020 is an abundant number, since it is smaller than the sum of its proper divisors (12284929844).

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

11100401020 is a wasteful number, since it uses less digits than its factorization.

11100401020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773549 (or 1773547 counting only the distinct ones).

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

Adding to 11100401020 its reverse (2010400111), we get a palindrome (13110801131).

Subtracting from 11100401020 its reverse (2010400111), we obtain a palindrome (9090000909).

The spelling of 11100401020 in words is "eleven billion, one hundred million, four hundred one thousand, twenty".