121200201202121 has 4 divisors (see below), whose sum is σ = 121219479115392. Its totient is φ = 121180923288852.

The previous prime is 121200201202081. The next prime is 121200201202163. The reversal of 121200201202121 is 121202102002121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121200201202121 is a prime.

It is a super-2 number, since 2×121200201202121² (a number of 29 digits) contains 22 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 121200201202121.

It is not an unprimeable number, because it can be changed into a prime (121200201202021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9638947205 + ... + 9638959778.

It is an arithmetic number, because the mean of its divisors is an integer number (30304869778848).

Almost surely, 2^{121200201202121} is an apocalyptic number.

It is an amenable number.

121200201202121 is a deficient number, since it is larger than the sum of its proper divisors (19277913271).

121200201202121 is an equidigital number, since it uses as much as digits as its factorization.

121200201202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19277913270.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121200201202121 its reverse (121202102002121), we get a palindrome (242402303204242).

The spelling of 121200201202121 in words is "one hundred twenty-one trillion, two hundred billion, two hundred one million, two hundred two thousand, one hundred twenty-one".