131121220201 has 8 divisors (see below), whose sum is σ = 138874455720. Its totient is φ = 123372453888.

The previous prime is 131121220183. The next prime is 131121220213. The reversal of 131121220201 is 102022121131.

It can be written as a sum of positive squares in 4 ways, for example, as 3390034176 + 127731186025 = 58224^2 + 357395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131121220201 - 2⁷ = 131121220073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121220271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1056796 + ... + 1174333.

It is an arithmetic number, because the mean of its divisors is an integer number (17359306965).

Almost surely, 2^131121220201 is an apocalyptic number.

It is an amenable number.

131121220201 is a deficient number, since it is larger than the sum of its proper divisors (7753235519).

131121220201 is a wasteful number, since it uses less digits than its factorization.

131121220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234603.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 131121220201 its reverse (102022121131), we get a palindrome (233143341332).

The spelling of 131121220201 in words is "one hundred thirty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred one".