201022001220 has 48 divisors (see below), whose sum is σ = 578074085568. Its totient is φ = 52157059200.

The previous prime is 201022001209. The next prime is 201022001221. The reversal of 201022001220 is 22100220102.

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 = 201022001196 and 201022001205.

It is not an unprimeable number, because it can be changed into a prime (201022001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45273006 + ... + 45277445.

It is an arithmetic number, because the mean of its divisors is an integer number (12043210116).

Almost surely, 2^201022001220 is an apocalyptic number.

201022001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201022001220 is an abundant number, since it is smaller than the sum of its proper divisors (377052084348).

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

201022001220 is a wasteful number, since it uses less digits than its factorization.

201022001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90550500 (or 90550498 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 201022001220 its reverse (22100220102), we get a palindrome (223122221322).

The spelling of 201022001220 in words is "two hundred one billion, twenty-two million, one thousand, two hundred twenty".