131121152030105 has 4 divisors (see below), whose sum is σ = 157345382436132. Its totient is φ = 104896921624080.

The previous prime is 131121152030101. The next prime is 131121152030107. The reversal of 131121152030105 is 501030251121131.

It is a happy number.

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 31736761664521 + 99384390365584 = 5633539^2 + 9969172^2 .

It is not a de Polignac number, because 131121152030105 - 2² = 131121152030101 is a prime.

It is a super-2 number, since 2×131121152030105² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131121152030101) 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, 13112115203006 + ... + 13112115203015.

It is an arithmetic number, because the mean of its divisors is an integer number (39336345609033).

Almost surely, 2^{131121152030105} is an apocalyptic number.

It is an amenable number.

131121152030105 is a deficient number, since it is larger than the sum of its proper divisors (26224230406027).

131121152030105 is an equidigital number, since it uses as much as digits as its factorization.

131121152030105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26224230406026.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 131121152030105 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, one hundred fifty-two million, thirty thousand, one hundred five".