201001233220 has 24 divisors (see below), whose sum is σ = 426281827608. Its totient is φ = 79604448000.

The previous prime is 201001233151. The next prime is 201001233227. The reversal of 201001233220 is 22332100102.

It can be written as a sum of positive squares in 4 ways, for example, as 16841810176 + 184159423044 = 129776^2 + 429138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201001233194 and 201001233203.

It is not an unprimeable number, because it can be changed into a prime (201001233227) 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, 49750761 + ... + 49754800.

It is an arithmetic number, because the mean of its divisors is an integer number (17761742817).

Almost surely, 2^201001233220 is an apocalyptic number.

201001233220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201001233220 is an abundant number, since it is smaller than the sum of its proper divisors (225280594388).

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

201001233220 is a wasteful number, since it uses less digits than its factorization.

201001233220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99505671 (or 99505669 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 201001233220 its reverse (22332100102), we get a palindrome (223333333322).

The spelling of 201001233220 in words is "two hundred one billion, one million, two hundred thirty-three thousand, two hundred twenty".