131221143211 has 8 divisors (see below), whose sum is σ = 133234328304. Its totient is φ = 129213786240.

The previous prime is 131221143161. The next prime is 131221143217. The reversal of 131221143211 is 112341122131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131221143211 - 2⁷ = 131221143083 is a prime.

It is a super-3 number, since 3×131221143211³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131221143217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1411645 + ... + 1501726.

It is an arithmetic number, because the mean of its divisors is an integer number (16654291038).

Almost surely, 2^131221143211 is an apocalyptic number.

131221143211 is a deficient number, since it is larger than the sum of its proper divisors (2013185093).

131221143211 is an equidigital number, since it uses as much as digits as its factorization.

131221143211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914061.

The product of its digits is 288, while the sum is 22.

Adding to 131221143211 its reverse (112341122131), we get a palindrome (243562265342).

The spelling of 131221143211 in words is "one hundred thirty-one billion, two hundred twenty-one million, one hundred forty-three thousand, two hundred eleven".