21001210002111 has 8 divisors (see below), whose sum is σ = 28030995935280. Its totient is φ = 13986115368512.

The previous prime is 21001210002103. The next prime is 21001210002181. The reversal of 21001210002111 is 11120001210012.

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

It is a cyclic number.

It is not a de Polignac number, because 21001210002111 - 2³ = 21001210002103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001210002181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3672821556 + ... + 3672827273.

It is an arithmetic number, because the mean of its divisors is an integer number (3503874491910).

Almost surely, 2^{21001210002111} is an apocalyptic number.

21001210002111 is a deficient number, since it is larger than the sum of its proper divisors (7029785933169).

21001210002111 is an equidigital number, since it uses as much as digits as its factorization.

21001210002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7345649785.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21001210002111 its reverse (11120001210012), we get a palindrome (32121211212123).

The spelling of 21001210002111 in words is "twenty-one trillion, one billion, two hundred ten million, two thousand, one hundred eleven".