200131221 has 4 divisors (see below), whose sum is σ = 266841632. Its totient is φ = 133420812.

The previous prime is 200131219. The next prime is 200131231. The reversal of 200131221 is 122131002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 200131221 - 2¹ = 200131219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200131197 and 200131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200131201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33355201 + ... + 33355206.

It is an arithmetic number, because the mean of its divisors is an integer number (66710408).

Almost surely, 2^200131221 is an apocalyptic number.

It is an amenable number.

200131221 is a deficient number, since it is larger than the sum of its proper divisors (66710411).

200131221 is an equidigital number, since it uses as much as digits as its factorization.

200131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66710410.

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

The square root of 200131221 is about 14146.7742259499. The cubic root of 200131221 is about 584.9314171919.

Adding to 200131221 its reverse (122131002), we get a palindrome (322262223).

The spelling of 200131221 in words is "two hundred million, one hundred thirty-one thousand, two hundred twenty-one".