1211223001033 has 4 divisors (see below), whose sum is σ = 1211225213380. Its totient is φ = 1211220788688.

The previous prime is 1211223000997. The next prime is 1211223001091. The reversal of 1211223001033 is 3301003221121.

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 895167653689 + 316055347344 = 946133^2 + 562188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211223001033 is a prime.

It is a super-2 number, since 2×1211223001033² (a number of 25 digits) contains 22 as substring.

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 1211223001033.

It is not an unprimeable number, because it can be changed into a prime (1211223001333) 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, 386083 + ... + 1603591.

It is an arithmetic number, because the mean of its divisors is an integer number (302806303345).

Almost surely, 2^{1211223001033} is an apocalyptic number.

It is an amenable number.

1211223001033 is a deficient number, since it is larger than the sum of its proper divisors (2212347).

1211223001033 is an equidigital number, since it uses as much as digits as its factorization.

1211223001033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212346.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1211223001033 its reverse (3301003221121), we get a palindrome (4512226222154).

The spelling of 1211223001033 in words is "one trillion, two hundred eleven billion, two hundred twenty-three million, one thousand, thirty-three".