131400121 has 8 divisors (see below), whose sum is σ = 134757000. Its totient is φ = 128050560.

The previous prime is 131400119. The next prime is 131400167. The reversal of 131400121 is 121004131.

It can be written as a sum of positive squares in 4 ways, for example, as 3370896 + 128029225 = 1836^2 + 11315^2 .

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 131400121 - 2¹ = 131400119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131400221) 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, 62475 + ... + 64543.

It is an arithmetic number, because the mean of its divisors is an integer number (16844625).

Almost surely, 2^131400121 is an apocalyptic number.

It is an amenable number.

131400121 is a deficient number, since it is larger than the sum of its proper divisors (3356879).

131400121 is a wasteful number, since it uses less digits than its factorization.

131400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 131400121 is about 11462.9891825824. The cubic root of 131400121 is about 508.3918600593.

Adding to 131400121 its reverse (121004131), we get a palindrome (252404252).

The spelling of 131400121 in words is "one hundred thirty-one million, four hundred thousand, one hundred twenty-one".