21020111000002 has 8 divisors (see below), whose sum is σ = 31690218107196. Its totient is φ = 10456704964272.

The previous prime is 21020110999981. The next prime is 21020111000003. The reversal of 21020111000002 is 20000011102012.

It can be written as a sum of positive squares in 2 ways, for example, as 20906009591481 + 114101408521 = 4572309^2 + 337789^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21020111000003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26675267373 + ... + 26675268160.

Almost surely, 2^{21020111000002} is an apocalyptic number.

21020111000002 is a deficient number, since it is larger than the sum of its proper divisors (10670107107194).

21020111000002 is a wasteful number, since it uses less digits than its factorization.

21020111000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53350535732.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21020111000002 its reverse (20000011102012), we get a palindrome (41020122102014).

It can be divided in two parts, 2102011 and 1000002, that added together give a palindrome (3102013).

The spelling of 21020111000002 in words is "twenty-one trillion, twenty billion, one hundred eleven million, two", and thus it is an aban number.