21021122021110 has 32 divisors (see below), whose sum is σ = 39144193941600. Its totient is φ = 8118208815360.

The previous prime is 21021122021093. The next prime is 21021122021113. The reversal of 21021122021110 is 1112022112012.

It is a super-3 number, since 3×21021122021110³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021122021113) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6812481 + ... + 9404899.

It is an arithmetic number, because the mean of its divisors is an integer number (1223256060675).

Almost surely, 2^{21021122021110} is an apocalyptic number.

21021122021110 is a deficient number, since it is larger than the sum of its proper divisors (18123071920490).

21021122021110 is a wasteful number, since it uses less digits than its factorization.

21021122021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620416.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21021122021110 its reverse (1112022112012), we get a palindrome (22133144133122).

The spelling of 21021122021110 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-two million, twenty-one thousand, one hundred ten".