131000031121243 has 4 divisors (see below), whose sum is σ = 131139244757808. Its totient is φ = 130860817484680.

The previous prime is 131000031121187. The next prime is 131000031121283. The reversal of 131000031121243 is 342121130000131.

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 131000031121243 - 2²⁵ = 130999997566811 is a prime.

It is a super-2 number, since 2×131000031121243² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131000031121283) 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, 69606816871 + ... + 69606818752.

It is an arithmetic number, because the mean of its divisors is an integer number (32784811189452).

Almost surely, 2^{131000031121243} is an apocalyptic number.

131000031121243 is a deficient number, since it is larger than the sum of its proper divisors (139213636565).

131000031121243 is an equidigital number, since it uses as much as digits as its factorization.

131000031121243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139213636564.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 131000031121243 its reverse (342121130000131), we get a palindrome (473121161121374).

The spelling of 131000031121243 in words is "one hundred thirty-one trillion, thirty-one million, one hundred twenty-one thousand, two hundred forty-three".