21222211022002 has 4 divisors (see below), whose sum is σ = 31833316533006. Its totient is φ = 10611105511000.

The previous prime is 21222211021997. The next prime is 21222211022087. The reversal of 21222211022002 is 20022011222212.

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., 10811463510241 + 10410747511761 = 3288079^2 + 3226569^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305552755499 + ... + 5305552755502.

Almost surely, 2^{21222211022002} is an apocalyptic number.

21222211022002 is a deficient number, since it is larger than the sum of its proper divisors (10611105511004).

21222211022002 is a wasteful number, since it uses less digits than its factorization.

21222211022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10611105511003.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222211022002 its reverse (20022011222212), we get a palindrome (41244222244214).

The spelling of 21222211022002 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, twenty-two thousand, two".