121100231001001 has 16 divisors (see below), whose sum is σ = 140777079317248. Its totient is φ = 102020198414400.

The previous prime is 121100231000989. The next prime is 121100231001031. The reversal of 121100231001001 is 100100132001121.

It is a happy number.

It is not a de Polignac number, because 121100231001001 - 2³⁹ = 120550475187113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100231001031) 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, 108272130 + ... + 109384891.

It is an arithmetic number, because the mean of its divisors is an integer number (8798567457328).

Almost surely, 2^{121100231001001} is an apocalyptic number.

It is an amenable number.

121100231001001 is a deficient number, since it is larger than the sum of its proper divisors (19676848316247).

121100231001001 is a wasteful number, since it uses less digits than its factorization.

121100231001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217658392.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121100231001001 its reverse (100100132001121), we get a palindrome (221200363002122).

The spelling of 121100231001001 in words is "one hundred twenty-one trillion, one hundred billion, two hundred thirty-one million, one thousand, one".