221402122 has 8 divisors (see below), whose sum is σ = 333329472. Its totient is φ = 110292300.

The previous prime is 221402107. The next prime is 221402131. The reversal of 221402122 is 221204122.

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

It is a super-2 number, since 2×221402122² = 98037799252205768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221402096 and 221402105.

It is an unprimeable number.

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, 203704 + ... + 204787.

It is an arithmetic number, because the mean of its divisors is an integer number (41666184).

Almost surely, 2^221402122 is an apocalyptic number.

221402122 is a deficient number, since it is larger than the sum of its proper divisors (111927350).

221402122 is a wasteful number, since it uses less digits than its factorization.

221402122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408764.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221402122 is about 14879.5874270761. The cubic root of 221402122 is about 604.9608352946.

Adding to 221402122 its reverse (221204122), we get a palindrome (442606244).

The spelling of 221402122 in words is "two hundred twenty-one million, four hundred two thousand, one hundred twenty-two".