21221120021122 has 32 divisors (see below), whose sum is σ = 37516722877440. Its totient is φ = 8814692942160.

The previous prime is 21221120021107. The next prime is 21221120021141. The reversal of 21221120021122 is 22112002112212.

It is a super-2 number, since 2×21221120021122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21221120021122.

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 in 15 ways as a sum of consecutive naturals, for example, 180866908 + ... + 180984199.

It is an arithmetic number, because the mean of its divisors is an integer number (1172397589920).

Almost surely, 2^{21221120021122} is an apocalyptic number.

21221120021122 is a deficient number, since it is larger than the sum of its proper divisors (16295602856318).

21221120021122 is a wasteful number, since it uses less digits than its factorization.

21221120021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361851246.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21221120021122 its reverse (22112002112212), we get a palindrome (43333122133334).

The spelling of 21221120021122 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one hundred twenty-two".