11021121111111 has 8 divisors (see below), whose sum is σ = 14709567197424. Its totient is φ = 7340044549440.

The previous prime is 11021121111109. The next prime is 11021121111157. The reversal of 11021121111111 is 11111112112011.

It is a happy number.

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

It is not a de Polignac number, because 11021121111111 - 2¹ = 11021121111109 is a prime.

It is a super-2 number, since 2×11021121111111² (a number of 27 digits) contains 22 as substring.

11021121111111 is a modest number, since divided by 1111111 gives 1102112 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021121113111) 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, 1842377670 + ... + 1842383651.

It is an arithmetic number, because the mean of its divisors is an integer number (1838695899678).

Almost surely, 2^{11021121111111} is an apocalyptic number.

11021121111111 is a deficient number, since it is larger than the sum of its proper divisors (3688446086313).

11021121111111 is an equidigital number, since it uses as much as digits as its factorization.

11021121111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684762321.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 11021121111111 its reverse (11111112112011), we get a palindrome (22132233223122).

The spelling of 11021121111111 in words is "eleven trillion, twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred eleven".