21211122000022 has 4 divisors (see below), whose sum is σ = 31816683000036. Its totient is φ = 10605561000010.

The previous prime is 21211121999959. The next prime is 21211122000077. The reversal of 21211122000022 is 22000022111212.

It is a happy number.

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

It is a congruent number.

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, 5302780500004 + ... + 5302780500007.

It is an arithmetic number, because the mean of its divisors is an integer number (7954170750009).

Almost surely, 2^{21211122000022} is an apocalyptic number.

21211122000022 is a deficient number, since it is larger than the sum of its proper divisors (10605561000014).

21211122000022 is a wasteful number, since it uses less digits than its factorization.

21211122000022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605561000013.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21211122000022 its reverse (22000022111212), we get a palindrome (43211144111234).

The spelling of 21211122000022 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-two million, twenty-two", and thus it is an aban number.