121200120121 has 8 divisors (see below), whose sum is σ = 122966701344. Its totient is φ = 119445277440.

The previous prime is 121200120109. The next prime is 121200120133. The reversal of 121200120121 is 121021002121.

It is an interprime number because it is at equal distance from previous prime (121200120109) and next prime (121200120133).

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

It is a cyclic number.

It is not a de Polignac number, because 121200120121 - 2⁹ = 121200119609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121200120191) 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, 2913835 + ... + 2955136.

It is an arithmetic number, because the mean of its divisors is an integer number (15370837668).

Almost surely, 2^121200120121 is an apocalyptic number.

It is an amenable number.

121200120121 is a deficient number, since it is larger than the sum of its proper divisors (1766581223).

121200120121 is a wasteful number, since it uses less digits than its factorization.

121200120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5869271.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121200120121 its reverse (121021002121), we get a palindrome (242221122242).

The spelling of 121200120121 in words is "one hundred twenty-one billion, two hundred million, one hundred twenty thousand, one hundred twenty-one".