1121210121 has 16 divisors (see below), whose sum is σ = 1578324800. Its totient is φ = 706019328.

The previous prime is 1121210117. The next prime is 1121210137. The reversal of 1121210121 is 1210121211.

It is not a de Polignac number, because 1121210121 - 2² = 1121210117 is a prime.

It is a super-2 number, since 2×1121210121² = 2514224270865669282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121210097 and 1121210106.

It is not an unprimeable number, because it can be changed into a prime (1121210171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9976 + ... + 48393.

It is an arithmetic number, because the mean of its divisors is an integer number (98645300).

Almost surely, 2^1121210121 is an apocalyptic number.

It is an amenable number.

1121210121 is a deficient number, since it is larger than the sum of its proper divisors (457114679).

1121210121 is a wasteful number, since it uses less digits than its factorization.

1121210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58728.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1121210121 is about 33484.4758208935. The cubic root of 1121210121 is about 1038.8727063501.

Adding to 1121210121 its reverse (1210121211), we get a palindrome (2331331332).

The spelling of 1121210121 in words is "one billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".