121100432321 has 16 divisors (see below), whose sum is σ = 138211170048. Its totient is φ = 105120892800.

The previous prime is 121100432317. The next prime is 121100432351. The reversal of 121100432321 is 123234001121.

It is not a de Polignac number, because 121100432321 - 2² = 121100432317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121100432293 and 121100432302.

It is not an unprimeable number, because it can be changed into a prime (121100432351) 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, 2835350 + ... + 2877743.

It is an arithmetic number, because the mean of its divisors is an integer number (8638198128).

Almost surely, 2^121100432321 is an apocalyptic number.

121100432321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121100432321 is a deficient number, since it is larger than the sum of its proper divisors (17110737727).

121100432321 is a wasteful number, since it uses less digits than its factorization.

121100432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5713192.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121100432321 its reverse (123234001121), we get a palindrome (244334433442).

The spelling of 121100432321 in words is "one hundred twenty-one billion, one hundred million, four hundred thirty-two thousand, three hundred twenty-one".