121112021021121 has 12 divisors (see below), whose sum is σ = 188396477144148. Its totient is φ = 74530474474464.

The previous prime is 121112021021107. The next prime is 121112021021161. The reversal of 121112021021121 is 121120120211121.

It is a happy number.

121112021021121 is a `hidden beast` number, since 1 + 211 + 12 + 0 + 210 + 211 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 36860550121521 + 84251470899600 = 6071289^2 + 9178860^2 .

It is not a de Polignac number, because 121112021021121 - 2¹⁹ = 121112020496833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121112021021094 and 121112021021103.

It is not an unprimeable number, because it can be changed into a prime (121112021021161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 517572739290 + ... + 517572739523.

It is an arithmetic number, because the mean of its divisors is an integer number (15699706428679).

Almost surely, 2^{121112021021121} is an apocalyptic number.

It is an amenable number.

121112021021121 is a deficient number, since it is larger than the sum of its proper divisors (67284456123027).

121112021021121 is a wasteful number, since it uses less digits than its factorization.

121112021021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035145478832 (or 1035145478829 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121112021021121 its reverse (121120120211121), we get a palindrome (242232141232242).

The spelling of 121112021021121 in words is "one hundred twenty-one trillion, one hundred twelve billion, twenty-one million, twenty-one thousand, one hundred twenty-one".