21001202000111 has 4 divisors (see below), whose sum is σ = 21237170562000. Its totient is φ = 20765233438224.

The previous prime is 21001202000101. The next prime is 21001202000131. The reversal of 21001202000111 is 11100020210012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21001202000111 - 2³⁰ = 21000128258287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21001202000092 and 21001202000101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001202000101) 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, 117984280811 + ... + 117984280988.

It is an arithmetic number, because the mean of its divisors is an integer number (5309292640500).

Almost surely, 2^{21001202000111} is an apocalyptic number.

21001202000111 is a deficient number, since it is larger than the sum of its proper divisors (235968561889).

21001202000111 is an equidigital number, since it uses as much as digits as its factorization.

21001202000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235968561888.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21001202000111 its reverse (11100020210012), we get a palindrome (32101222210123).

The spelling of 21001202000111 in words is "twenty-one trillion, one billion, two hundred two million, one hundred eleven", and thus it is an aban number.