111020001001 has 16 divisors (see below), whose sum is σ = 136678665088. Its totient is φ = 87815145600.

The previous prime is 111020000999. The next prime is 111020001019. The reversal of 111020001001 is 100100020111.

It is not a de Polignac number, because 111020001001 - 2¹ = 111020000999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (111020001061) 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, 154141 + ... + 495781.

It is an arithmetic number, because the mean of its divisors is an integer number (8542416568).

Almost surely, 2^111020001001 is an apocalyptic number.

It is an amenable number.

111020001001 is a deficient number, since it is larger than the sum of its proper divisors (25658664087).

111020001001 is a wasteful number, since it uses less digits than its factorization.

111020001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345232.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 111020001001 its reverse (100100020111), we get a palindrome (211120021112).

The spelling of 111020001001 in words is "one hundred eleven billion, twenty million, one thousand, one".