1200110000121 has 20 divisors (see below), whose sum is σ = 1792787840272. Its totient is φ = 800059531608.

The previous prime is 1200110000107. The next prime is 1200110000143. The reversal of 1200110000121 is 1210000110021.

It is a happy number.

It is not a de Polignac number, because 1200110000121 - 2¹³ = 1200109991929 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 (1200110000191) 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, 7114866 + ... + 7281588.

Almost surely, 2^{1200110000121} is an apocalyptic number.

It is an amenable number.

1200110000121 is a deficient number, since it is larger than the sum of its proper divisors (592677840151).

1200110000121 is an equidigital number, since it uses as much as digits as its factorization.

1200110000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255602 (or 255593 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1200110000121 its reverse (1210000110021), we get a palindrome (2410110110142).

The spelling of 1200110000121 in words is "one trillion, two hundred billion, one hundred ten million, one hundred twenty-one", and thus it is an aban number.