21113201021012 has 24 divisors (see below), whose sum is σ = 39524834185704. Its totient is φ = 9833194893312.

The previous prime is 21113201020991. The next prime is 21113201021021. The reversal of 21113201021012 is 21012010231112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3875724566596 + 17237476454416 = 1968686^2 + 4151804^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 1600448303 + ... + 1600461494.

It is an arithmetic number, because the mean of its divisors is an integer number (1646868091071).

Almost surely, 2^{21113201021012} is an apocalyptic number.

It is an amenable number.

21113201021012 is a deficient number, since it is larger than the sum of its proper divisors (18411633164692).

21113201021012 is a wasteful number, since it uses less digits than its factorization.

21113201021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200909915 (or 3200909913 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21113201021012 its reverse (21012010231112), we get a palindrome (42125211252124).

The spelling of 21113201021012 in words is "twenty-one trillion, one hundred thirteen billion, two hundred one million, twenty-one thousand, twelve".