131012122204121 has 4 divisors (see below), whose sum is σ = 135529781590500. Its totient is φ = 126494462817744.

The previous prime is 131012122204111. The next prime is 131012122204127. The reversal of 131012122204121 is 121402221210131.

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 30903192556096 + 100108929648025 = 5559064^2 + 10005445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131012122204121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131012122204127) 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, 2258829693146 + ... + 2258829693203.

It is an arithmetic number, because the mean of its divisors is an integer number (33882445397625).

Almost surely, 2^{131012122204121} is an apocalyptic number.

It is an amenable number.

131012122204121 is a deficient number, since it is larger than the sum of its proper divisors (4517659386379).

131012122204121 is an equidigital number, since it uses as much as digits as its factorization.

131012122204121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517659386378.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 131012122204121 its reverse (121402221210131), we get a palindrome (252414343414252).

The spelling of 131012122204121 in words is "one hundred thirty-one trillion, twelve billion, one hundred twenty-two million, two hundred four thousand, one hundred twenty-one".