105402221 has 4 divisors (see below), whose sum is σ = 105487200. Its totient is φ = 105317244.

The previous prime is 105402203. The next prime is 105402239. The reversal of 105402221 is 122204501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122204501 = 3433 ⋅35597.

It is an interprime number because it is at equal distance from previous prime (105402203) and next prime (105402239).

It is a cyclic number.

It is not a de Polignac number, because 105402221 - 2²⁶ = 38293357 is a prime.

It is a super-2 number, since 2×105402221² = 22219256383465682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105402221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105402251) 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, 40601 + ... + 43118.

It is an arithmetic number, because the mean of its divisors is an integer number (26371800).

Almost surely, 2^105402221 is an apocalyptic number.

It is an amenable number.

105402221 is a deficient number, since it is larger than the sum of its proper divisors (84979).

105402221 is an equidigital number, since it uses as much as digits as its factorization.

105402221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84978.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 105402221 is about 10266.5583814636. The cubic root of 105402221 is about 472.3710290666.

Adding to 105402221 its reverse (122204501), we get a palindrome (227606722).

The spelling of 105402221 in words is "one hundred five million, four hundred two thousand, two hundred twenty-one".