21211122222002 has 16 divisors (see below), whose sum is σ = 32108797057920. Its totient is φ = 10508191188048.

The previous prime is 21211122221981. The next prime is 21211122222013. The reversal of 21211122222002 is 20022222111212.

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 in 7 ways as a sum of consecutive naturals, for example, 48414893 + ... + 48851039.

It is an arithmetic number, because the mean of its divisors is an integer number (2006799816120).

Almost surely, 2^{21211122222002} is an apocalyptic number.

21211122222002 is a deficient number, since it is larger than the sum of its proper divisors (10897674835918).

21211122222002 is a wasteful number, since it uses less digits than its factorization.

21211122222002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659345.

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

Adding to 21211122222002 its reverse (20022222111212), we get a palindrome (41233344333214).

The spelling of 21211122222002 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, two".