1111212102121 has 32 divisors (see below), whose sum is σ = 1235898259200. Its totient is φ = 990673152000.

The previous prime is 1111212102113. The next prime is 1111212102127. The reversal of 1111212102121 is 1212012121111.

It is a cyclic number.

It is not a de Polignac number, because 1111212102121 - 2³ = 1111212102113 is a prime.

It is a super-3 number, since 3×1111212102121³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1111212102095 and 1111212102104.

It is not an unprimeable number, because it can be changed into a prime (1111212102127) 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 31 ways as a sum of consecutive naturals, for example, 364449805 + ... + 364452853.

It is an arithmetic number, because the mean of its divisors is an integer number (38621820600).

Almost surely, 2^{1111212102121} is an apocalyptic number.

1111212102121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111212102121 is a deficient number, since it is larger than the sum of its proper divisors (124686157079).

1111212102121 is a wasteful number, since it uses less digits than its factorization.

1111212102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6177.

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

Adding to 1111212102121 its reverse (1212012121111), we get a palindrome (2323224223232).

The spelling of 1111212102121 in words is "one trillion, one hundred eleven billion, two hundred twelve million, one hundred two thousand, one hundred twenty-one".