131121123 has 8 divisors (see below), whose sum is σ = 199803648. Its totient is φ = 74926344.

The previous prime is 131121121. The next prime is 131121127. The reversal of 131121123 is 321121131.

It is a happy number.

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

It is not a de Polignac number, because 131121123 - 2¹ = 131121121 is a prime.

It is a super-2 number, since 2×131121123² = 34385497793562258, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 3121911 + ... + 3121952.

It is an arithmetic number, because the mean of its divisors is an integer number (24975456).

Almost surely, 2^131121123 is an apocalyptic number.

131121123 is a deficient number, since it is larger than the sum of its proper divisors (68682525).

131121123 is an equidigital number, since it uses as much as digits as its factorization.

131121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6243873.

The product of its digits is 36, while the sum is 15.

The square root of 131121123 is about 11450.8132025634. The cubic root of 131121123 is about 508.0317872828.

Adding to 131121123 its reverse (321121131), we get a palindrome (452242254).

The spelling of 131121123 in words is "one hundred thirty-one million, one hundred twenty-one thousand, one hundred twenty-three".