111110021001 has 48 divisors (see below), whose sum is σ = 191535960000. Its totient is φ = 63473590656.

The previous prime is 111110020999. The next prime is 111110021051. The reversal of 111110021001 is 100120011111.

It is not a de Polignac number, because 111110021001 - 2¹ = 111110020999 is a prime.

It is a super-2 number, since 2×111110021001² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (111110021051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5762625 + ... + 5781873.

It is an arithmetic number, because the mean of its divisors is an integer number (3990332500).

Almost surely, 2^111110021001 is an apocalyptic number.

It is an amenable number.

111110021001 is a deficient number, since it is larger than the sum of its proper divisors (80425938999).

111110021001 is a wasteful number, since it uses less digits than its factorization.

111110021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23635 (or 23622 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 111110021001 its reverse (100120011111), we get a palindrome (211230032112).

The spelling of 111110021001 in words is "one hundred eleven billion, one hundred ten million, twenty-one thousand, one".