131121101 has 4 divisors (see below), whose sum is σ = 131709312. Its totient is φ = 130532892.

The previous prime is 131121031. The next prime is 131121113. The reversal of 131121101 is 101121131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131121101 - 2¹⁸ = 130858957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121121) 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, 293771 + ... + 294216.

It is an arithmetic number, because the mean of its divisors is an integer number (32927328).

Almost surely, 2^131121101 is an apocalyptic number.

It is an amenable number.

131121101 is a deficient number, since it is larger than the sum of its proper divisors (588211).

131121101 is an equidigital number, since it uses as much as digits as its factorization.

131121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588210.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 131121101 is about 11450.8122419329. The cubic root of 131121101 is about 508.0317588697.

Adding to 131121101 its reverse (101121131), we get a palindrome (232242232).

The spelling of 131121101 in words is "one hundred thirty-one million, one hundred twenty-one thousand, one hundred one".