105150021 has 8 divisors (see below), whose sum is σ = 140248800. Its totient is φ = 70075632.

The previous prime is 105149939. The next prime is 105150061. The reversal of 105150021 is 120051501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-105150021 is a prime.

It is a super-2 number, since 2×105150021² = 22113053832600882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105150061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10155 + ... + 17703.

It is an arithmetic number, because the mean of its divisors is an integer number (17531100).

Almost surely, 2^105150021 is an apocalyptic number.

It is an amenable number.

105150021 is a deficient number, since it is larger than the sum of its proper divisors (35098779).

105150021 is an equidigital number, since it uses as much as digits as its factorization.

105150021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12195.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 105150021 is about 10254.2684283180. The cubic root of 105150021 is about 471.9939746550.

The spelling of 105150021 in words is "one hundred five million, one hundred fifty thousand, twenty-one".