111211110021001 has 8 divisors (see below), whose sum is σ = 117173039518080. Its totient is φ = 105343069177632.

The previous prime is 111211110020999. The next prime is 111211110021019. The reversal of 111211110021001 is 100120011112111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111211110021001 - 2¹ = 111211110020999 is a prime.

It is a super-2 number, since 2×111211110021001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111211110021041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23472160996 + ... + 23472165733.

It is an arithmetic number, because the mean of its divisors is an integer number (14646629939760).

Almost surely, 2^{111211110021001} is an apocalyptic number.

It is an amenable number.

111211110021001 is a deficient number, since it is larger than the sum of its proper divisors (5961929497079).

111211110021001 is a wasteful number, since it uses less digits than its factorization.

111211110021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46944326855.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111211110021001 its reverse (100120011112111), we get a palindrome (211331121133112).

The spelling of 111211110021001 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred ten million, twenty-one thousand, one".