111021200121111 has 16 divisors (see below), whose sum is σ = 170672287421184. Its totient is φ = 62879263784064.

The previous prime is 111021200121107. The next prime is 111021200121119. The reversal of 111021200121111 is 111121002120111.

It is not a de Polignac number, because 111021200121111 - 2² = 111021200121107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021200121119) 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 15 ways as a sum of consecutive naturals, for example, 23392580881 + ... + 23392585626.

It is an arithmetic number, because the mean of its divisors is an integer number (10667017963824).

Almost surely, 2^{111021200121111} is an apocalyptic number.

111021200121111 is a deficient number, since it is larger than the sum of its proper divisors (59651087300073).

111021200121111 is a wasteful number, since it uses less digits than its factorization.

111021200121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46785166630.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111021200121111 its reverse (111121002120111), we get a palindrome (222142202241222).

The spelling of 111021200121111 in words is "one hundred eleven trillion, twenty-one billion, two hundred million, one hundred twenty-one thousand, one hundred eleven".