131221202867 has 2 divisors, whose sum is σ = 131221202868. Its totient is φ = 131221202866.

The previous prime is 131221202839. The next prime is 131221202927. The reversal of 131221202867 is 768202122131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131221202867 - 2³⁰ = 130147461043 is a prime.

It is not a weakly prime, because it can be changed into another prime (131221204867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65610601433 + 65610601434.

It is an arithmetic number, because the mean of its divisors is an integer number (65610601434).

Almost surely, 2^131221202867 is an apocalyptic number.

131221202867 is a deficient number, since it is larger than the sum of its proper divisors (1).

131221202867 is an equidigital number, since it uses as much as digits as its factorization.

131221202867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

Adding to 131221202867 its reverse (768202122131), we get a palindrome (899423324998).

The spelling of 131221202867 in words is "one hundred thirty-one billion, two hundred twenty-one million, two hundred two thousand, eight hundred sixty-seven".