21002222011202 has 16 divisors (see below), whose sum is σ = 32129930006712. Its totient is φ = 10292642805120.

The previous prime is 21002222011159. The next prime is 21002222011273. The reversal of 21002222011202 is 20211022220012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20890832281201 + 111389730001 = 4570649^2 + 333751^2 .

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, 99259499 + ... + 99470862.

Almost surely, 2^{21002222011202} is an apocalyptic number.

21002222011202 is a deficient number, since it is larger than the sum of its proper divisors (11127707995510).

21002222011202 is a wasteful number, since it uses less digits than its factorization.

21002222011202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198731413.

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

Adding to 21002222011202 its reverse (20211022220012), we get a palindrome (41213244231214).

The spelling of 21002222011202 in words is "twenty-one trillion, two billion, two hundred twenty-two million, eleven thousand, two hundred two".