21211011022122 has 24 divisors (see below), whose sum is σ = 46287817823520. Its totient is φ = 7019471272680.

The previous prime is 21211011022111. The next prime is 21211011022139. The reversal of 21211011022122 is 22122011011212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21211011022095 and 21211011022104.

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 11 ways as a sum of consecutive naturals, for example, 4238808654 + ... + 4238813657.

It is an arithmetic number, because the mean of its divisors is an integer number (1928659075980).

Almost surely, 2^{21211011022122} is an apocalyptic number.

21211011022122 is an abundant number, since it is smaller than the sum of its proper divisors (25076806801398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211011022122 is a wasteful number, since it uses less digits than its factorization.

21211011022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477622458 (or 8477622455 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21211011022122 its reverse (22122011011212), we get a palindrome (43333022033334).

The spelling of 21211011022122 in words is "twenty-one trillion, two hundred eleven billion, eleven million, twenty-two thousand, one hundred twenty-two".