121112211001 has 8 divisors (see below), whose sum is σ = 123693579360. Its totient is φ = 118548463392.

The previous prime is 121112210993. The next prime is 121112211013. The reversal of 121112211001 is 100112211121.

It is a happy number.

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 121112211001 - 2³ = 121112210993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121112218001) 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, 4391295 + ... + 4418788.

It is an arithmetic number, because the mean of its divisors is an integer number (15461697420).

Almost surely, 2^121112211001 is an apocalyptic number.

It is an amenable number.

121112211001 is a deficient number, since it is larger than the sum of its proper divisors (2581368359).

121112211001 is an equidigital number, since it uses as much as digits as its factorization.

121112211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8810375.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121112211001 its reverse (100112211121), we get a palindrome (221224422122).

The spelling of 121112211001 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred eleven thousand, one".