111201002121111 has 16 divisors (see below), whose sum is σ = 174915247577088. Its totient is φ = 61493641725600.

The previous prime is 111201002121103. The next prime is 111201002121191. The reversal of 111201002121111 is 111121200102111.

It is not a de Polignac number, because 111201002121111 - 2³ = 111201002121103 is a prime.

It is a super-2 number, since 2×111201002121111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201002121191) 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, 85407835080 + ... + 85407836381.

It is an arithmetic number, because the mean of its divisors is an integer number (10932202973568).

Almost surely, 2^{111201002121111} is an apocalyptic number.

111201002121111 is a deficient number, since it is larger than the sum of its proper divisors (63714245455977).

111201002121111 is a wasteful number, since it uses less digits than its factorization.

111201002121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170815671502.

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

Adding to 111201002121111 its reverse (111121200102111), we get a palindrome (222322202223222).

The spelling of 111201002121111 in words is "one hundred eleven trillion, two hundred one billion, two million, one hundred twenty-one thousand, one hundred eleven".