201102112020 has 96 divisors (see below), whose sum is σ = 577149664896. Its totient is φ = 52303680000.

The previous prime is 201102111997. The next prime is 201102112109. The reversal of 201102112020 is 20211201102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 201102111987 and 201102112005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158370 + ... + 653670.

It is an arithmetic number, because the mean of its divisors is an integer number (6011975676).

Almost surely, 2^201102112020 is an apocalyptic number.

201102112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201102112020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288574832448).

201102112020 is an abundant number, since it is smaller than the sum of its proper divisors (376047552876).

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

201102112020 is a wasteful number, since it uses less digits than its factorization.

201102112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495481 (or 495479 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201102112020 its reverse (20211201102), we get a palindrome (221313313122).

The spelling of 201102112020 in words is "two hundred one billion, one hundred two million, one hundred twelve thousand, twenty".