21120220021022 has 16 divisors (see below), whose sum is σ = 32433485728320. Its totient is φ = 10310156807808.

The previous prime is 21120220021007. The next prime is 21120220021049. The reversal of 21120220021022 is 22012002202112.

It is a happy number.

It is a congruent number.

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, 274635383 + ... + 274712274.

It is an arithmetic number, because the mean of its divisors is an integer number (2027092858020).

Almost surely, 2^{21120220021022} is an apocalyptic number.

21120220021022 is a deficient number, since it is larger than the sum of its proper divisors (11313265707298).

21120220021022 is a wasteful number, since it uses less digits than its factorization.

21120220021022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549348115.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21120220021022 its reverse (22012002202112), we get a palindrome (43132222223134).

The spelling of 21120220021022 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty million, twenty-one thousand, twenty-two".