221222321402 has 8 divisors (see below), whose sum is σ = 333282537300. Its totient is φ = 110128142304.

The previous prime is 221222321357. The next prime is 221222321473. The reversal of 221222321402 is 204123222122.

It can be written as a sum of positive squares in 2 ways, for example, as 209691642241 + 11530679161 = 457921^2 + 107381^2 .

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

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, 241508627 + ... + 241509542.

Almost surely, 2^221222321402 is an apocalyptic number.

221222321402 is a deficient number, since it is larger than the sum of its proper divisors (112060215898).

221222321402 is a wasteful number, since it uses less digits than its factorization.

221222321402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483018400.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 221222321402 its reverse (204123222122), we get a palindrome (425345543524).

The spelling of 221222321402 in words is "two hundred twenty-one billion, two hundred twenty-two million, three hundred twenty-one thousand, four hundred two".