1121201000001 has 16 divisors (see below), whose sum is σ = 1661055803200. Its totient is φ = 747459555264.

The previous prime is 1121200999991. The next prime is 1121201000009. The reversal of 1121201000001 is 1000001021211.

It is a happy number.

It is not a de Polignac number, because 1121201000001 - 2⁵ = 1121200999969 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 (1121201000009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3751065 + ... + 4038921.

It is an arithmetic number, because the mean of its divisors is an integer number (103815987700).

Almost surely, 2^{1121201000001} is an apocalyptic number.

It is an amenable number.

1121201000001 is a deficient number, since it is larger than the sum of its proper divisors (539854803199).

1121201000001 is a wasteful number, since it uses less digits than its factorization.

1121201000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432125 (or 432119 counting only the distinct ones).

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

Adding to 1121201000001 its reverse (1000001021211), we get a palindrome (2121202021212).

The spelling of 1121201000001 in words is "one trillion, one hundred twenty-one billion, two hundred one million, one", and thus it is an aban number.