221004122 has 8 divisors (see below), whose sum is σ = 332446356. Its totient is φ = 110188672.

The previous prime is 221004109. The next prime is 221004127. The reversal of 221004122 is 221400122.

It can be written as a sum of positive squares in 2 ways, for example, as 220195921 + 808201 = 14839^2 + 899^2 .

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 = 221004097 and 221004106.

It is not an unprimeable number, because it can be changed into a prime (221004127) 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, 155813 + ... + 157224.

Almost surely, 2^221004122 is an apocalyptic number.

221004122 is a deficient number, since it is larger than the sum of its proper divisors (111442234).

221004122 is a wasteful number, since it uses less digits than its factorization.

221004122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313392.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 221004122 is about 14866.2073845349. The cubic root of 221004122 is about 604.5981184587.

Adding to 221004122 its reverse (221400122), we get a palindrome (442404244).

The spelling of 221004122 in words is "two hundred twenty-one million, four thousand, one hundred twenty-two".