210021112101011 has 4 divisors (see below), whose sum is σ = 210021379119192. Its totient is φ = 210020845082832.

The previous prime is 210021112100953. The next prime is 210021112101019. The reversal of 210021112101011 is 110101211120012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210021112101011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021112101019) 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 3 ways as a sum of consecutive naturals, for example, 132325781 + ... + 133903526.

It is an arithmetic number, because the mean of its divisors is an integer number (52505344779798).

Almost surely, 2^{210021112101011} is an apocalyptic number.

210021112101011 is a deficient number, since it is larger than the sum of its proper divisors (267018181).

210021112101011 is an equidigital number, since it uses as much as digits as its factorization.

210021112101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267018180.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 210021112101011 its reverse (110101211120012), we get a palindrome (320122323221023).

The spelling of 210021112101011 in words is "two hundred ten trillion, twenty-one billion, one hundred twelve million, one hundred one thousand, eleven".