121112021022121 has 16 divisors (see below), whose sum is σ = 131163567235200. Its totient is φ = 111408066665728.

The previous prime is 121112021022107. The next prime is 121112021022133. The reversal of 121112021022121 is 121220120211121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121112021022121 - 2²⁷ = 121111886804393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121112021022221) 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, 348814261 + ... + 349161298.

It is an arithmetic number, because the mean of its divisors is an integer number (8197722952200).

Almost surely, 2^{121112021022121} is an apocalyptic number.

It is an amenable number.

121112021022121 is a deficient number, since it is larger than the sum of its proper divisors (10051546213079).

121112021022121 is a wasteful number, since it uses less digits than its factorization.

121112021022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697975808.

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

Adding to 121112021022121 its reverse (121220120211121), we get a palindrome (242332141233242).

The spelling of 121112021022121 in words is "one hundred twenty-one trillion, one hundred twelve billion, twenty-one million, twenty-two thousand, one hundred twenty-one".