1121210210121 has 8 divisors (see below), whose sum is σ = 1494971738400. Its totient is φ = 747461077632.

The previous prime is 1121210210119. The next prime is 1121210210143. The reversal of 1121210210121 is 1210120121211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121210210121 - 2¹ = 1121210210119 is a prime.

It is a super-2 number, since 2×1121210210121² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121210210121.

It is not an unprimeable number, because it can be changed into a prime (1121210210191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2885800 + ... + 3251193.

It is an arithmetic number, because the mean of its divisors is an integer number (186871467300).

Almost surely, 2^{1121210210121} is an apocalyptic number.

It is an amenable number.

1121210210121 is a deficient number, since it is larger than the sum of its proper divisors (373761528279).

1121210210121 is an equidigital number, since it uses as much as digits as its factorization.

1121210210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6197895.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1121210210121 its reverse (1210120121211), we get a palindrome (2331330331332).

It can be divided in two parts, 1121210 and 210121, that added together give a palindrome (1331331).

The spelling of 1121210210121 in words is "one trillion, one hundred twenty-one billion, two hundred ten million, two hundred ten thousand, one hundred twenty-one".