131121121025 has 24 divisors (see below), whose sum is σ = 163417219200. Its totient is φ = 104364417600.

The previous prime is 131121121009. The next prime is 131121121031. The reversal of 131121121025 is 520121121131.

It is not a de Polignac number, because 131121121025 - 2⁴ = 131121121009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131121120988 and 131121121006.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4993631 + ... + 5019819.

It is an arithmetic number, because the mean of its divisors is an integer number (6809050800).

Almost surely, 2^131121121025 is an apocalyptic number.

It is an amenable number.

131121121025 is a deficient number, since it is larger than the sum of its proper divisors (32296098175).

131121121025 is a wasteful number, since it uses less digits than its factorization.

131121121025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27209 (or 27204 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 131121121025 its reverse (520121121131), we get a palindrome (651242242156).

The spelling of 131121121025 in words is "one hundred thirty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-five".