1111222202121 has 24 divisors (see below), whose sum is σ = 1706306135040. Its totient is φ = 694875780000.

The previous prime is 1111222202117. The next prime is 1111222202141. The reversal of 1111222202121 is 1212022221111.

1111222202121 is a `hidden beast` number, since 111 + 122 + 220 + 212 + 1 = 666.

It is not a de Polignac number, because 1111222202121 - 2² = 1111222202117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111222202094 and 1111222202103.

It is not an unprimeable number, because it can be changed into a prime (1111222202141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32152905 + ... + 32187446.

It is an arithmetic number, because the mean of its divisors is an integer number (71096088960).

Almost surely, 2^{1111222202121} is an apocalyptic number.

It is an amenable number.

1111222202121 is a deficient number, since it is larger than the sum of its proper divisors (595083932919).

1111222202121 is a wasteful number, since it uses less digits than its factorization.

1111222202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64340477 (or 64340474 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1111222202121 its reverse (1212022221111), we get a palindrome (2323244423232).

The spelling of 1111222202121 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, two hundred two thousand, one hundred twenty-one".