131121322011 has 12 divisors (see below), whose sum is σ = 191272688880. Its totient is φ = 86548726800.

The previous prime is 131121321983. The next prime is 131121322021. The reversal of 131121322011 is 110223121131.

131121322011 is a `hidden beast` number, since 1 + 311 + 21 + 322 + 0 + 11 = 666.

It is not a de Polignac number, because 131121322011 - 2⁵ = 131121321979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131121322021) 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, 72123031 + ... + 72124848.

It is an arithmetic number, because the mean of its divisors is an integer number (15939390740).

Almost surely, 2^131121322011 is an apocalyptic number.

131121322011 is a deficient number, since it is larger than the sum of its proper divisors (60151366869).

131121322011 is a wasteful number, since it uses less digits than its factorization.

131121322011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144247986 (or 144247983 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131121322011 its reverse (110223121131), we get a palindrome (241344443142).

The spelling of 131121322011 in words is "one hundred thirty-one billion, one hundred twenty-one million, three hundred twenty-two thousand, eleven".