121221112000121 has 8 divisors (see below), whose sum is σ = 139194993875904. Its totient is φ = 103411375164720.

The previous prime is 121221112000117. The next prime is 121221112000129. The reversal of 121221112000121 is 121000211122121.

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

It is not a de Polignac number, because 121221112000121 - 2² = 121221112000117 is a prime.

It is a super-3 number, since 3×121221112000121³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121221112000121.

It is not an unprimeable number, because it can be changed into a prime (121221112000129) 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, 41036258510 + ... + 41036261463.

It is an arithmetic number, because the mean of its divisors is an integer number (17399374234488).

Almost surely, 2^{121221112000121} is an apocalyptic number.

It is an amenable number.

121221112000121 is a deficient number, since it is larger than the sum of its proper divisors (17973881875783).

121221112000121 is an equidigital number, since it uses as much as digits as its factorization.

121221112000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82072520191.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121221112000121 its reverse (121000211122121), we get a palindrome (242221323122242).

The spelling of 121221112000121 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one hundred twenty-one", and thus it is an aban number.