131451321121 has 8 divisors (see below), whose sum is σ = 131799144960. Its totient is φ = 131103849552.

The previous prime is 131451321119. The next prime is 131451321137. The reversal of 131451321121 is 121123154131.

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 131451321121 - 2¹ = 131451321119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131451328121) 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, 667776 + ... + 841918.

It is an arithmetic number, because the mean of its divisors is an integer number (16474893120).

Almost surely, 2^131451321121 is an apocalyptic number.

It is an amenable number.

131451321121 is a deficient number, since it is larger than the sum of its proper divisors (347823839).

131451321121 is a wasteful number, since it uses less digits than its factorization.

131451321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176135.

The product of its digits is 720, while the sum is 25.

Adding to 131451321121 its reverse (121123154131), we get a palindrome (252574475252).

The spelling of 131451321121 in words is "one hundred thirty-one billion, four hundred fifty-one million, three hundred twenty-one thousand, one hundred twenty-one".