121400120121 has 8 divisors (see below), whose sum is σ = 184990659264. Its totient is φ = 69371497200.

The previous prime is 121400119969. The next prime is 121400120147. The reversal of 121400120121 is 121021004121.

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

It is not a de Polignac number, because 121400120121 - 2²⁹ = 120863249209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121400120121.

It is not an unprimeable number, because it can be changed into a prime (121400120221) 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, 2890479030 + ... + 2890479071.

It is an arithmetic number, because the mean of its divisors is an integer number (23123832408).

Almost surely, 2^121400120121 is an apocalyptic number.

It is an amenable number.

121400120121 is a deficient number, since it is larger than the sum of its proper divisors (63590539143).

121400120121 is an equidigital number, since it uses as much as digits as its factorization.

121400120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5780958111.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121400120121 its reverse (121021004121), we get a palindrome (242421124242).

The spelling of 121400120121 in words is "one hundred twenty-one billion, four hundred million, one hundred twenty thousand, one hundred twenty-one".