131211121011 has 8 divisors (see below), whose sum is σ = 174970845120. Its totient is φ = 87462738792.

The previous prime is 131211121009. The next prime is 131211121039. The reversal of 131211121011 is 110121112131.

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

It is not a de Polignac number, because 131211121011 - 2¹ = 131211121009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131211121001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2808441 + ... + 2854778.

It is an arithmetic number, because the mean of its divisors is an integer number (21871355640).

Almost surely, 2^131211121011 is an apocalyptic number.

131211121011 is a deficient number, since it is larger than the sum of its proper divisors (43759724109).

131211121011 is an equidigital number, since it uses as much as digits as its factorization.

131211121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670945.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 131211121011 its reverse (110121112131), we get a palindrome (241332233142).

The spelling of 131211121011 in words is "one hundred thirty-one billion, two hundred eleven million, one hundred twenty-one thousand, eleven".