201220320132 has 36 divisors (see below), whose sum is σ = 547766428300. Its totient is φ = 61913944512.

The previous prime is 201220320127. The next prime is 201220320137. The reversal of 201220320132 is 231023022102.

It is an interprime number because it is at equal distance from previous prime (201220320127) and next prime (201220320137).

It can be written as a sum of positive squares in 2 ways, for example, as 39910450176 + 161309869956 = 199776^2 + 401634^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201220320137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214978507 + ... + 214979442.

Almost surely, 2^201220320132 is an apocalyptic number.

It is an amenable number.

201220320132 is an abundant number, since it is smaller than the sum of its proper divisors (346546108168).

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

201220320132 is a wasteful number, since it uses less digits than its factorization.

201220320132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429957972 (or 429957967 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 201220320132 its reverse (231023022102), we get a palindrome (432243342234).

The spelling of 201220320132 in words is "two hundred one billion, two hundred twenty million, three hundred twenty thousand, one hundred thirty-two".