221262122 has 8 divisors (see below), whose sum is σ = 332111556. Its totient is φ = 110558272.

The previous prime is 221262113. The next prime is 221262127.

221262122 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 168714121 + 52548001 = 12989^2 + 7249^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 221262094 and 221262103.

It is not an unprimeable number, because it can be changed into a prime (221262127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32513 + ... + 38724.

Almost surely, 2^221262122 is an apocalyptic number.

221262122 is a deficient number, since it is larger than the sum of its proper divisors (110849434).

221262122 is a wasteful number, since it uses less digits than its factorization.

221262122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72792.

The product of its digits is 384, while the sum is 20.

The square root of 221262122 is about 14874.8822516348. The cubic root of 221262122 is about 604.8332960548.

The spelling of 221262122 in words is "two hundred twenty-one million, two hundred sixty-two thousand, one hundred twenty-two".