131222201 has 12 divisors (see below), whose sum is σ = 152722836. Its totient is φ = 112273920.

The previous prime is 131222183. The next prime is 131222209. The reversal of 131222201 is 102222131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 118831801 + 12390400 = 10901^2 + 3520^2 .

It is not a de Polignac number, because 131222201 - 2¹⁰ = 131221177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131222209) 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, 29840 + ... + 33953.

It is an arithmetic number, because the mean of its divisors is an integer number (12726903).

Almost surely, 2^131222201 is an apocalyptic number.

131222201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131222201 is a deficient number, since it is larger than the sum of its proper divisors (21500635).

131222201 is a wasteful number, since it uses less digits than its factorization.

131222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63832 (or 63821 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 131222201 is about 11455.2259253146. The cubic root of 131222201 is about 508.1622967600.

Adding to 131222201 its reverse (102222131), we get a palindrome (233444332).

The spelling of 131222201 in words is "one hundred thirty-one million, two hundred twenty-two thousand, two hundred one".