21211110122011 has 8 divisors (see below), whose sum is σ = 21259624700160. Its totient is φ = 21162596443368.

The previous prime is 21211110122003. The next prime is 21211110122063. The reversal of 21211110122011 is 11022101111212.

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 21211110122011 - 2³ = 21211110122003 is a prime.

It is a super-2 number, since 2×21211110122011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211110122071) 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, 78114900 + ... + 78385966.

It is an arithmetic number, because the mean of its divisors is an integer number (2657453087520).

Almost surely, 2^{21211110122011} is an apocalyptic number.

21211110122011 is a deficient number, since it is larger than the sum of its proper divisors (48514578149).

21211110122011 is a wasteful number, since it uses less digits than its factorization.

21211110122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449753.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 21211110122011 its reverse (11022101111212), we get a palindrome (32233211233223).

The spelling of 21211110122011 in words is "twenty-one trillion, two hundred eleven billion, one hundred ten million, one hundred twenty-two thousand, eleven".