2111211223201 has 4 divisors (see below), whose sum is σ = 2116087000132. Its totient is φ = 2106335446272.

The previous prime is 2111211223181. The next prime is 2111211223207. The reversal of 2111211223201 is 1023221121112.

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 475879225600 + 1635331997601 = 689840^2 + 1278801^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111211223201 - 2¹¹ = 2111211221153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111211223207) 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, 2437887816 + ... + 2437888681.

It is an arithmetic number, because the mean of its divisors is an integer number (529021750033).

Almost surely, 2^{2111211223201} is an apocalyptic number.

It is an amenable number.

2111211223201 is a deficient number, since it is larger than the sum of its proper divisors (4875776931).

2111211223201 is an equidigital number, since it uses as much as digits as its factorization.

2111211223201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875776930.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2111211223201 its reverse (1023221121112), we get a palindrome (3134432344313).

The spelling of 2111211223201 in words is "two trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty-three thousand, two hundred one".