121200302231211 has 12 divisors (see below), whose sum is σ = 187984142236392. Its totient is φ = 69257315560608.

The previous prime is 121200302231191. The next prime is 121200302231231. The reversal of 121200302231211 is 112132203002121.

It is an interprime number because it is at equal distance from previous prime (121200302231191) and next prime (121200302231231).

It is not a de Polignac number, because 121200302231211 - 2⁹ = 121200302230699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (121200302231231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412245925810 + ... + 412245926103.

It is an arithmetic number, because the mean of its divisors is an integer number (15665345186366).

Almost surely, 2^{121200302231211} is an apocalyptic number.

121200302231211 is a deficient number, since it is larger than the sum of its proper divisors (66783840005181).

121200302231211 is an equidigital number, since it uses as much as digits as its factorization.

121200302231211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824491851930 (or 824491851923 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121200302231211 its reverse (112132203002121), we get a palindrome (233332505233332).

The spelling of 121200302231211 in words is "one hundred twenty-one trillion, two hundred billion, three hundred two million, two hundred thirty-one thousand, two hundred eleven".