10351220521 has 4 divisors (see below), whose sum is σ = 10351619200. Its totient is φ = 10350821844.

The previous prime is 10351220497. The next prime is 10351220557. The reversal of 10351220521 is 12502215301.

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 10351220521 - 2⁷ = 10351220393 is a prime.

It is a super-2 number, since 2×10351220521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10351220492 and 10351220501.

It is not an unprimeable number, because it can be changed into a prime (10351223521) 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, 157461 + ... + 213298.

It is an arithmetic number, because the mean of its divisors is an integer number (2587904800).

Almost surely, 2^10351220521 is an apocalyptic number.

It is an amenable number.

10351220521 is a deficient number, since it is larger than the sum of its proper divisors (398679).

10351220521 is an equidigital number, since it uses as much as digits as its factorization.

10351220521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398678.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 10351220521 its reverse (12502215301), we get a palindrome (22853435822).

The spelling of 10351220521 in words is "ten billion, three hundred fifty-one million, two hundred twenty thousand, five hundred twenty-one".