1211133213001 has 4 divisors (see below), whose sum is σ = 1214010014404. Its totient is φ = 1208256411600.

The previous prime is 1211133212987. The next prime is 1211133213019. The reversal of 1211133213001 is 1003123311121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26466409225 + 1184666803776 = 162685^2 + 1088424^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211133213001 - 2⁵ = 1211133212969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211133213001.

It is not an unprimeable number, because it can be changed into a prime (1211133213091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438400070 + ... + 1438400911.

It is an arithmetic number, because the mean of its divisors is an integer number (303502503601).

Almost surely, 2^{1211133213001} is an apocalyptic number.

It is an amenable number.

1211133213001 is a deficient number, since it is larger than the sum of its proper divisors (2876801403).

1211133213001 is an equidigital number, since it uses as much as digits as its factorization.

1211133213001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876801402.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1211133213001 its reverse (1003123311121), we get a palindrome (2214256524122).

The spelling of 1211133213001 in words is "one trillion, two hundred eleven billion, one hundred thirty-three million, two hundred thirteen thousand, one".