106221155 has 4 divisors (see below), whose sum is σ = 127465392. Its totient is φ = 84976920.

The previous prime is 106221139. The next prime is 106221161. The reversal of 106221155 is 551122601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 106221155 - 2⁴ = 106221139 is a prime.

It is a super-2 number, since 2×106221155² = 22565867539068050, 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 106221155.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10622111 + ... + 10622120.

It is an arithmetic number, because the mean of its divisors is an integer number (31866348).

Almost surely, 2^106221155 is an apocalyptic number.

106221155 is a deficient number, since it is larger than the sum of its proper divisors (21244237).

106221155 is an equidigital number, since it uses as much as digits as its factorization.

106221155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21244236.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 106221155 is about 10306.3647810467. The cubic root of 106221155 is about 473.5912536120.

Adding to 106221155 its reverse (551122601), we get a palindrome (657343756).

The spelling of 106221155 in words is "one hundred six million, two hundred twenty-one thousand, one hundred fifty-five".