21110220021012 has 24 divisors (see below), whose sum is σ = 49353952519200. Its totient is φ = 7022915368416.

The previous prime is 21110220020969. The next prime is 21110220021019. The reversal of 21110220021012 is 21012002201112.

It is a super-3 number, since 3×21110220021012³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21110220020982 and 21110220021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110220021019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1728073462 + ... + 1728085677.

It is an arithmetic number, because the mean of its divisors is an integer number (2056414688300).

Almost surely, 2^{21110220021012} is an apocalyptic number.

It is an amenable number.

21110220021012 is an abundant number, since it is smaller than the sum of its proper divisors (28243732498188).

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

21110220021012 is a wasteful number, since it uses less digits than its factorization.

21110220021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456159655 (or 3456159653 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21110220021012 its reverse (21012002201112), we get a palindrome (42122222222124).

The spelling of 21110220021012 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty million, twenty-one thousand, twelve".