201111213020 has 48 divisors (see below), whose sum is σ = 424362818880.
Its totient is φ = 80058653184.
The previous prime is 201111213011. The next prime is 201111213041. The reversal of 201111213020 is 20312111102.
It is a junction number, because it is equal to n+sod(n) for n = 201111212986 and 201111213004.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4726601 + ... + 4768959.
It is an arithmetic number, because the mean of its divisors is an integer number (8840892060).
Almost surely, 2201111213020 is an apocalyptic number.
201111213020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
201111213020 is an abundant number, since it is smaller than the sum of its proper divisors (223251605860).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
201111213020 is a wasteful number, since it uses less digits than its factorization.
201111213020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 43502 (or 43500 counting only the distinct ones).
The product of its (nonzero) digits is 24, while the sum is 14.
Adding to 201111213020 its reverse (20312111102), we get a palindrome (221423324122).
The spelling of 201111213020 in words is "two hundred one billion, one hundred eleven million, two hundred thirteen thousand, twenty".