111121111100001 has 32 divisors (see below), whose sum is σ = 162430554700800. Its totient is φ = 67323190253760.

The previous prime is 111121111099997. The next prime is 111121111100009. The reversal of 111121111100001 is 100001111121111.

It is not a de Polignac number, because 111121111100001 - 2² = 111121111099997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111121111100001.

It is not an unprimeable number, because it can be changed into a prime (111121111100009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370899591 + ... + 371199068.

It is an arithmetic number, because the mean of its divisors is an integer number (5075954834400).

Almost surely, 2^{111121111100001} is an apocalyptic number.

It is an amenable number.

111121111100001 is a deficient number, since it is larger than the sum of its proper divisors (51309443600799).

111121111100001 is a wasteful number, since it uses less digits than its factorization.

111121111100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742098789.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 111121111100001 its reverse (100001111121111), we get a palindrome (211122222221112).

It can be divided in two parts, 111121111 and 100001, that multiplied together give a palindrome (11112222221111).

The spelling of 111121111100001 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred eleven million, one hundred thousand, one".