1121210121211 has 4 divisors (see below), whose sum is σ = 1121596348752. Its totient is φ = 1120823893672.

The previous prime is 1121210121203. The next prime is 1121210121223.

1121210121211 is nontrivially palindromic in base 10.

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 1121210121211 - 2³ = 1121210121203 is a prime.

It is a super-2 number, since 2×1121210121211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121210121271) 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, 193109416 + ... + 193115221.

It is an arithmetic number, because the mean of its divisors is an integer number (280399087188).

Almost surely, 2^{1121210121211} is an apocalyptic number.

1121210121211 is a deficient number, since it is larger than the sum of its proper divisors (386227541).

1121210121211 is an equidigital number, since it uses as much as digits as its factorization.

1121210121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386227540.

The product of its (nonzero) digits is 16, while the sum is 16.

It can be divided in two parts, 1121210 and 121211, that added together give a palindrome (1242421).

The spelling of 1121210121211 in words is "one trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-one thousand, two hundred eleven".