1121212122121 has 16 divisors (see below), whose sum is σ = 1379994711424. Its totient is φ = 887086318464.

The previous prime is 1121212122113. The next prime is 1121212122127. The reversal of 1121212122121 is 1212212121211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1121212122121 - 2³ = 1121212122113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121212122127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3212245 + ... + 3544141.

It is an arithmetic number, because the mean of its divisors is an integer number (86249669464).

Almost surely, 2^{1121212122121} is an apocalyptic number.

It is an amenable number.

1121212122121 is a deficient number, since it is larger than the sum of its proper divisors (258782589303).

1121212122121 is a wasteful number, since it uses less digits than its factorization.

1121212122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369040.

The product of its digits is 64, while the sum is 19.

Adding to 1121212122121 its reverse (1212212121211), we get a palindrome (2333424243332).

The spelling of 1121212122121 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, one hundred twenty-one".