513003220121 has 4 divisors (see below), whose sum is σ = 586289394432. Its totient is φ = 439717045812.

The previous prime is 513003220091. The next prime is 513003220181. The reversal of 513003220121 is 121022300315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 513003220121 - 2⁶ = 513003220057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 513003220093 and 513003220102.

It is not an unprimeable number, because it can be changed into a prime (513003220181) 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, 36643087145 + ... + 36643087158.

It is an arithmetic number, because the mean of its divisors is an integer number (146572348608).

Almost surely, 2^513003220121 is an apocalyptic number.

It is an amenable number.

513003220121 is a deficient number, since it is larger than the sum of its proper divisors (73286174311).

513003220121 is an equidigital number, since it uses as much as digits as its factorization.

513003220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73286174310.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 513003220121 its reverse (121022300315), we get a palindrome (634025520436).

The spelling of 513003220121 in words is "five hundred thirteen billion, three million, two hundred twenty thousand, one hundred twenty-one".