105230210021 has 4 divisors (see below), whose sum is σ = 105630325152. Its totient is φ = 104830094892.

The previous prime is 105230210017. The next prime is 105230210027. The reversal of 105230210021 is 120012032501.

It is a happy number.

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 105230210021 - 2² = 105230210017 is a prime.

It is a super-2 number, since 2×105230210021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105230210027) 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, 200057171 + ... + 200057696.

It is an arithmetic number, because the mean of its divisors is an integer number (26407581288).

Almost surely, 2^105230210021 is an apocalyptic number.

It is an amenable number.

105230210021 is a deficient number, since it is larger than the sum of its proper divisors (400115131).

105230210021 is an equidigital number, since it uses as much as digits as its factorization.

105230210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400115130.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 105230210021 its reverse (120012032501), we get a palindrome (225242242522).

The spelling of 105230210021 in words is "one hundred five billion, two hundred thirty million, two hundred ten thousand, twenty-one".