210021000111111 has 8 divisors (see below), whose sum is σ = 320032000169344. Its totient is φ = 120012000063480.

The previous prime is 210021000111077. The next prime is 210021000111119. The reversal of 210021000111111 is 111111000120012.

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

It is not a de Polignac number, because 210021000111111 - 2¹⁴ = 210021000094727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021000111119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5000500002625 + ... + 5000500002666.

It is an arithmetic number, because the mean of its divisors is an integer number (40004000021168).

Almost surely, 2^{210021000111111} is an apocalyptic number.

210021000111111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210021000111111 is a deficient number, since it is larger than the sum of its proper divisors (110011000058233).

210021000111111 is a wasteful number, since it uses less digits than its factorization.

210021000111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001000005301.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 210021000111111 its reverse (111111000120012), we get a palindrome (321132000231123).

The spelling of 210021000111111 in words is "two hundred ten trillion, twenty-one billion, one hundred eleven thousand, one hundred eleven".