201001101220 has 48 divisors (see below), whose sum is σ = 431419262400. Its totient is φ = 78640513920.

The previous prime is 201001101173. The next prime is 201001101227. The reversal of 201001101220 is 22101100102.

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 = 201001101197 and 201001101206.

It is not an unprimeable number, because it can be changed into a prime (201001101227) 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, 241830 + ... + 678589.

It is an arithmetic number, because the mean of its divisors is an integer number (8987901300).

Almost surely, 2^201001101220 is an apocalyptic number.

201001101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201001101220 is an abundant number, since it is smaller than the sum of its proper divisors (230418161180).

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

201001101220 is a wasteful number, since it uses less digits than its factorization.

201001101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920668 (or 920666 counting only the distinct ones).

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

Adding to 201001101220 its reverse (22101100102), we get a palindrome (223102201322).

The spelling of 201001101220 in words is "two hundred one billion, one million, one hundred one thousand, two hundred twenty".