1121211102121 has 16 divisors (see below), whose sum is σ = 1236286551168. Its totient is φ = 1008343792000.

The previous prime is 1121211102049. The next prime is 1121211102161. The reversal of 1121211102121 is 1212011121211.

It is a cyclic number.

It is not a de Polignac number, because 1121211102121 - 2¹⁹ = 1121210577833 is a prime.

It is a super-2 number, since 2×1121211102121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121211102095 and 1121211102104.

It is not an unprimeable number, because it can be changed into a prime (1121211102161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 902460 + ... + 1748386.

It is an arithmetic number, because the mean of its divisors is an integer number (77267909448).

Almost surely, 2^{1121211102121} is an apocalyptic number.

1121211102121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121211102121 is a deficient number, since it is larger than the sum of its proper divisors (115075449047).

1121211102121 is a wasteful number, since it uses less digits than its factorization.

1121211102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847232.

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

Adding to 1121211102121 its reverse (1212011121211), we get a palindrome (2333222223332).

The spelling of 1121211102121 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, one hundred two thousand, one hundred twenty-one".