21011110010011 has 4 divisors (see below), whose sum is σ = 22921210920024. Its totient is φ = 19101009100000.

The previous prime is 21011110010003. The next prime is 21011110010227. The reversal of 21011110010011 is 11001001111012.

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 21011110010011 - 2³ = 21011110010003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21011110010011.

It is not an unprimeable number, because it can be changed into a prime (21011110011011) 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, 955050454990 + ... + 955050455011.

It is an arithmetic number, because the mean of its divisors is an integer number (5730302730006).

Almost surely, 2^{21011110010011} is an apocalyptic number.

21011110010011 is a deficient number, since it is larger than the sum of its proper divisors (1910100910013).

21011110010011 is a wasteful number, since it uses less digits than its factorization.

21011110010011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910100910012.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 21011110010011 its reverse (11001001111012), we get a palindrome (32012111121023).

The spelling of 21011110010011 in words is "twenty-one trillion, eleven billion, one hundred ten million, ten thousand, eleven".