1211232000001 has 4 divisors (see below), whose sum is σ = 1211234201604. Its totient is φ = 1211229798400.

The previous prime is 1211231999977. The next prime is 1211232000089. The reversal of 1211232000001 is 1000002321121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 847460171776 + 363771828225 = 920576^2 + 603135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211232000001 - 2²¹ = 1211229902849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211232004001) 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 3 ways as a sum of consecutive naturals, for example, 515841 + ... + 1639681.

It is an arithmetic number, because the mean of its divisors is an integer number (302808550401).

Almost surely, 2^{1211232000001} is an apocalyptic number.

It is an amenable number.

1211232000001 is a deficient number, since it is larger than the sum of its proper divisors (2201603).

1211232000001 is a wasteful number, since it uses less digits than its factorization.

1211232000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201602.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1211232000001 its reverse (1000002321121), we get a palindrome (2211234321122).

The spelling of 1211232000001 in words is "one trillion, two hundred eleven billion, two hundred thirty-two million, one", and thus it is an aban number.