111221101121001 has 8 divisors (see below), whose sum is σ = 152302769102784. Its totient is φ = 72143416943280.

The previous prime is 111221101120993. The next prime is 111221101121063. The reversal of 111221101121001 is 100121101122111.

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

It is not a de Polignac number, because 111221101121001 - 2³ = 111221101120993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111221101121701) 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, 500995950885 + ... + 500995951106.

It is an arithmetic number, because the mean of its divisors is an integer number (19037846137848).

Almost surely, 2^{111221101121001} is an apocalyptic number.

It is an amenable number.

111221101121001 is a deficient number, since it is larger than the sum of its proper divisors (41081667981783).

111221101121001 is a wasteful number, since it uses less digits than its factorization.

111221101121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001991902031.

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

Adding to 111221101121001 its reverse (100121101122111), we get a palindrome (211342202243112).

The spelling of 111221101121001 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred one million, one hundred twenty-one thousand, one".