131322121211 has 4 divisors (see below), whose sum is σ = 133171728624. Its totient is φ = 129472513800.

The previous prime is 131322121207. The next prime is 131322121223. The reversal of 131322121211 is 112121223131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131322121211 - 2² = 131322121207 is a prime.

It is a super-2 number, since 2×131322121211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131322120211) 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, 924803600 + ... + 924803741.

It is an arithmetic number, because the mean of its divisors is an integer number (33292932156).

Almost surely, 2^131322121211 is an apocalyptic number.

131322121211 is a deficient number, since it is larger than the sum of its proper divisors (1849607413).

131322121211 is an equidigital number, since it uses as much as digits as its factorization.

131322121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849607412.

The product of its digits is 144, while the sum is 20.

Adding to 131322121211 its reverse (112121223131), we get a palindrome (243443344342).

The spelling of 131322121211 in words is "one hundred thirty-one billion, three hundred twenty-two million, one hundred twenty-one thousand, two hundred eleven".