12231121200121 has 20 divisors (see below), whose sum is σ = 13103327934992. Its totient is φ = 11414423890584.

The previous prime is 12231121200073. The next prime is 12231121200163. The reversal of 12231121200121 is 12100212113221.

It is not a de Polignac number, because 12231121200121 - 2⁴³ = 3435028177913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12231121200821) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8031106 + ... + 9431908.

Almost surely, 2^{12231121200121} is an apocalyptic number.

It is an amenable number.

12231121200121 is a deficient number, since it is larger than the sum of its proper divisors (872206734871).

12231121200121 is an frugal number, since it uses more digits than its factorization.

12231121200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400946 (or 1400889 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12231121200121 its reverse (12100212113221), we get a palindrome (24331333313342).

The spelling of 12231121200121 in words is "twelve trillion, two hundred thirty-one billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-one".