131220201 has 16 divisors (see below), whose sum is σ = 202696064. Its totient is φ = 73954944.

The previous prime is 131220197. The next prime is 131220223. The reversal of 131220201 is 102022131.

It is not a de Polignac number, because 131220201 - 2² = 131220197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131220101) 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, 41266 + ... + 44331.

It is an arithmetic number, because the mean of its divisors is an integer number (12668504).

Almost surely, 2^131220201 is an apocalyptic number.

It is an amenable number.

131220201 is a deficient number, since it is larger than the sum of its proper divisors (71475863).

131220201 is an equidigital number, since it uses as much as digits as its factorization.

131220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85680.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 131220201 is about 11455.1386285806. The cubic root of 131220201 is about 508.1597150582.

Adding to 131220201 its reverse (102022131), we get a palindrome (233242332).

The spelling of 131220201 in words is "one hundred thirty-one million, two hundred twenty thousand, two hundred one".