130440012023021 has 4 divisors (see below), whose sum is σ = 130440458750844. Its totient is φ = 130439565295200.

The previous prime is 130440012023017. The next prime is 130440012023023. The reversal of 130440012023021 is 120320210044031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32928534478921 + 97511477544100 = 5738339^2 + 9874790^2 .

It is a cyclic number.

It is not a de Polignac number, because 130440012023021 - 2² = 130440012023017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130440012023023) 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, 222925640 + ... + 223510001.

It is an arithmetic number, because the mean of its divisors is an integer number (32610114687711).

Almost surely, 2^{130440012023021} is an apocalyptic number.

It is an amenable number.

130440012023021 is a deficient number, since it is larger than the sum of its proper divisors (446727823).

130440012023021 is an equidigital number, since it uses as much as digits as its factorization.

130440012023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446727822.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 130440012023021 its reverse (120320210044031), we get a palindrome (250760222067052).

The spelling of 130440012023021 in words is "one hundred thirty trillion, four hundred forty billion, twelve million, twenty-three thousand, twenty-one".