131011121 has 4 divisors (see below), whose sum is σ = 132235632. Its totient is φ = 129786612.

The previous prime is 131011079. The next prime is 131011123. The reversal of 131011121 is 121110131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121110131 = 1459 ⋅83009.

It is a cyclic number.

It is not a de Polignac number, because 131011121 - 2⁶ = 131011057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131011123) 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, 612095 + ... + 612308.

It is an arithmetic number, because the mean of its divisors is an integer number (33058908).

Almost surely, 2^131011121 is an apocalyptic number.

It is an amenable number.

131011121 is a deficient number, since it is larger than the sum of its proper divisors (1224511).

131011121 is a wasteful number, since it uses less digits than its factorization.

131011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224510.

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

The square root of 131011121 is about 11446.0089550900. The cubic root of 131011121 is about 507.8896791147.

Adding to 131011121 its reverse (121110131), we get a palindrome (252121252).

The spelling of 131011121 in words is "one hundred thirty-one million, eleven thousand, one hundred twenty-one".