21022021201012 has 24 divisors (see below), whose sum is σ = 39644960835816. Its totient is φ = 9695972646528.

The previous prime is 21022021201007. The next prime is 21022021201033. The reversal of 21022021201012 is 21010212022012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4791081833316 + 16230939367696 = 2188854^2 + 4028764^2 .

It is a super-3 number, since 3×21022021201012³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135310723 + ... + 135465994.

It is an arithmetic number, because the mean of its divisors is an integer number (1651873368159).

Almost surely, 2^{21022021201012} is an apocalyptic number.

It is an amenable number.

21022021201012 is a deficient number, since it is larger than the sum of its proper divisors (18622939634804).

21022021201012 is a wasteful number, since it uses less digits than its factorization.

21022021201012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270778227 (or 270778225 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022021201012 its reverse (21010212022012), we get a palindrome (42032233223024).

The spelling of 21022021201012 in words is "twenty-one trillion, twenty-two billion, twenty-one million, two hundred one thousand, twelve".