11211021011111 has 16 divisors (see below), whose sum is σ = 11964397040640. Its totient is φ = 10468084838400.

The previous prime is 11211021011063. The next prime is 11211021011117. The reversal of 11211021011111 is 11111012011211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211021011111 is a prime.

It is a super-2 number, since 2×11211021011111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211021011117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71879411 + ... + 72035211.

It is an arithmetic number, because the mean of its divisors is an integer number (747774815040).

Almost surely, 2^{11211021011111} is an apocalyptic number.

11211021011111 is a deficient number, since it is larger than the sum of its proper divisors (753376029529).

11211021011111 is a wasteful number, since it uses less digits than its factorization.

11211021011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189274.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 11211021011111 its reverse (11111012011211), we get a palindrome (22322033022322).

The spelling of 11211021011111 in words is "eleven trillion, two hundred eleven billion, twenty-one million, eleven thousand, one hundred eleven".