131121221133101 has 4 divisors (see below), whose sum is σ = 131135769152892. Its totient is φ = 131106673113312.

The previous prime is 131121221133073. The next prime is 131121221133113. The reversal of 131121221133101 is 101331122121131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 100824673240201 + 30296547892900 = 10041149^2 + 5504230^2 .

It is a cyclic number.

It is not a de Polignac number, because 131121221133101 - 2²² = 131121216938797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121221133151) 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, 7273996376 + ... + 7274014401.

It is an arithmetic number, because the mean of its divisors is an integer number (32783942288223).

Almost surely, 2^{131121221133101} is an apocalyptic number.

It is an amenable number.

131121221133101 is a deficient number, since it is larger than the sum of its proper divisors (14548019791).

131121221133101 is an equidigital number, since it uses as much as digits as its factorization.

131121221133101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14548019790.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 131121221133101 its reverse (101331122121131), we get a palindrome (232452343254232).

The spelling of 131121221133101 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred thirty-three thousand, one hundred one".