21220201001012 has 12 divisors (see below), whose sum is σ = 39991917271236. Its totient is φ = 9793938923520.

The previous prime is 21220201001003. The next prime is 21220201001033. The reversal of 21220201001012 is 21010010202212.

It can be written as a sum of positive squares in 2 ways, for example, as 2541173939236 + 18679027061776 = 1594106^2 + 4321924^2 .

It is a congruent number.

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, 204040394189 + ... + 204040394292.

It is an arithmetic number, because the mean of its divisors is an integer number (3332659772603).

Almost surely, 2^{21220201001012} is an apocalyptic number.

It is an amenable number.

21220201001012 is a deficient number, since it is larger than the sum of its proper divisors (18771716270224).

21220201001012 is a wasteful number, since it uses less digits than its factorization.

21220201001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408080788498 (or 408080788496 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21220201001012 its reverse (21010010202212), we get a palindrome (42230211203224).

The spelling of 21220201001012 in words is "twenty-one trillion, two hundred twenty billion, two hundred one million, one thousand, twelve".