513351121001 has 4 divisors (see below), whose sum is σ = 520383328212. Its totient is φ = 506318913792.

The previous prime is 513351120979. The next prime is 513351121021. The reversal of 513351121001 is 100121153315.

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 144354403600 + 368996717401 = 379940^2 + 607451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513351121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513351121021) 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, 3516103496 + ... + 3516103641.

It is an arithmetic number, because the mean of its divisors is an integer number (130095832053).

Almost surely, 2^513351121001 is an apocalyptic number.

It is an amenable number.

513351121001 is a deficient number, since it is larger than the sum of its proper divisors (7032207211).

513351121001 is an equidigital number, since it uses as much as digits as its factorization.

513351121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032207210.

The product of its (nonzero) digits is 450, while the sum is 23.

Adding to 513351121001 its reverse (100121153315), we get a palindrome (613472274316).

The spelling of 513351121001 in words is "five hundred thirteen billion, three hundred fifty-one million, one hundred twenty-one thousand, one".