221211222012002 has 4 divisors (see below), whose sum is σ = 331816833018006. Its totient is φ = 110605611006000.

The previous prime is 221211222011987. The next prime is 221211222012043. The reversal of 221211222012002 is 200210222112122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 154379109153721 + 66832112858281 = 12424939^2 + 8175091^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55302805502999 + ... + 55302805503002.

Almost surely, 2^{221211222012002} is an apocalyptic number.

221211222012002 is a deficient number, since it is larger than the sum of its proper divisors (110605611006004).

221211222012002 is a wasteful number, since it uses less digits than its factorization.

221211222012002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110605611006003.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221211222012002 its reverse (200210222112122), we get a palindrome (421421444124124).

The spelling of 221211222012002 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, twelve thousand, two".