121100112101221 has 16 divisors (see below), whose sum is σ = 132127467107328. Its totient is φ = 110075800777200.

The previous prime is 121100112101179. The next prime is 121100112101237. The reversal of 121100112101221 is 122101211001121.

It is a cyclic number.

It is not a de Polignac number, because 121100112101221 - 2⁷ = 121100112101093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121100112101195 and 121100112101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100112131221) 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, 4589372190 + ... + 4589398576.

It is an arithmetic number, because the mean of its divisors is an integer number (8257966694208).

Almost surely, 2^{121100112101221} is an apocalyptic number.

121100112101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121100112101221 is a deficient number, since it is larger than the sum of its proper divisors (11027355006107).

121100112101221 is a wasteful number, since it uses less digits than its factorization.

121100112101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68232.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 121100112101221 its reverse (122101211001121), we get a palindrome (243201323102342).

The spelling of 121100112101221 in words is "one hundred twenty-one trillion, one hundred billion, one hundred twelve million, one hundred one thousand, two hundred twenty-one".