121200200001 has 12 divisors (see below), whose sum is σ = 180714277120. Its totient is φ = 78193677240.

The previous prime is 121200199979. The next prime is 121200200053. The reversal of 121200200001 is 100002002121.

It is not a de Polignac number, because 121200200001 - 2⁹ = 121200199489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121200200101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217204381 + ... + 217204938.

Almost surely, 2^121200200001 is an apocalyptic number.

It is an amenable number.

121200200001 is a deficient number, since it is larger than the sum of its proper divisors (59514077119).

121200200001 is a wasteful number, since it uses less digits than its factorization.

121200200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434409356 (or 434409353 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121200200001 its reverse (100002002121), we get a palindrome (221202202122).

It can be divided in two parts, 121200 and 200001, that added together give a triangular number (321201 = T₈₀₁).

The spelling of 121200200001 in words is "one hundred twenty-one billion, two hundred million, two hundred thousand, one".