1121210212211 has 4 divisors (see below), whose sum is σ = 1122297711024. Its totient is φ = 1120122713400.

The previous prime is 1121210212201. The next prime is 1121210212237. The reversal of 1121210212211 is 1122120121211.

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

It is a cyclic number.

It is not a de Polignac number, because 1121210212211 - 2¹⁸ = 1121209950067 is a prime.

It is a super-2 number, since 2×1121210212211² (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 1121210212211.

It is not an unprimeable number, because it can be changed into a prime (1121210212201) 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, 543747860 + ... + 543749921.

It is an arithmetic number, because the mean of its divisors is an integer number (280574427756).

Almost surely, 2^{1121210212211} is an apocalyptic number.

1121210212211 is a deficient number, since it is larger than the sum of its proper divisors (1087498813).

1121210212211 is a wasteful number, since it uses less digits than its factorization.

1121210212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087498812.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1121210212211 its reverse (1122120121211), we get a palindrome (2243330333422).

The spelling of 1121210212211 in words is "one trillion, one hundred twenty-one billion, two hundred ten million, two hundred twelve thousand, two hundred eleven".