201231132220 has 48 divisors (see below), whose sum is σ = 430152968448. Its totient is φ = 79054940160.

The previous prime is 201231132169. The next prime is 201231132233. The reversal of 201231132220 is 22231132102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 698517 + ... + 943603.

It is an arithmetic number, because the mean of its divisors is an integer number (8961520176).

Almost surely, 2^201231132220 is an apocalyptic number.

201231132220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201231132220 is an abundant number, since it is smaller than the sum of its proper divisors (228921836228).

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

201231132220 is a wasteful number, since it uses less digits than its factorization.

201231132220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245830 (or 245828 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201231132220 its reverse (22231132102), we get a palindrome (223462264322).

The spelling of 201231132220 in words is "two hundred one billion, two hundred thirty-one million, one hundred thirty-two thousand, two hundred twenty".