106721222 has 4 divisors (see below), whose sum is σ = 160081836. Its totient is φ = 53360610.

The previous prime is 106721191. The next prime is 106721231. The reversal of 106721222 is 222127601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222127601 = 1013 ⋅219277.

It is a super-2 number, since 2×106721222² = 22778838450346568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26680304 + ... + 26680307.

It is an arithmetic number, because the mean of its divisors is an integer number (40020459).

Almost surely, 2^106721222 is an apocalyptic number.

106721222 is a deficient number, since it is larger than the sum of its proper divisors (53360614).

106721222 is an equidigital number, since it uses as much as digits as its factorization.

106721222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53360613.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 106721222 is about 10330.5964009829. The cubic root of 106721222 is about 474.3332799433. Note that the first 3 decimals are identical.

Adding to 106721222 its reverse (222127601), we get a palindrome (328848823).

The spelling of 106721222 in words is "one hundred six million, seven hundred twenty-one thousand, two hundred twenty-two".