21210220211002 has 8 divisors (see below), whose sum is σ = 31818530761812. Its totient is φ = 10604043290400.

The previous prime is 21210220210999. The next prime is 21210220211027. The reversal of 21210220211002 is 20011202201212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15891472660921 + 5318747550081 = 3986411^2 + 2306241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533382699 + ... + 533422462.

Almost surely, 2^{21210220211002} is an apocalyptic number.

21210220211002 is a deficient number, since it is larger than the sum of its proper divisors (10608310550810).

21210220211002 is a wasteful number, since it uses less digits than its factorization.

21210220211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066815104.

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

Adding to 21210220211002 its reverse (20011202201212), we get a palindrome (41221422412214).

The spelling of 21210220211002 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty million, two hundred eleven thousand, two".