121120022011221 has 12 divisors (see below), whose sum is σ = 174968276633280. Its totient is φ = 80738773466280.

The previous prime is 121120022011151. The next prime is 121120022011277. The reversal of 121120022011221 is 122110220021121.

121120022011221 is a `hidden beast` number, since 1 + 2 + 11 + 200 + 220 + 11 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-121120022011221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121120022011194 and 121120022011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120022011921) 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, 658892541 + ... + 659076338.

It is an arithmetic number, because the mean of its divisors is an integer number (14580689719440).

Almost surely, 2^{121120022011221} is an apocalyptic number.

It is an amenable number.

121120022011221 is a deficient number, since it is larger than the sum of its proper divisors (53848254622059).

121120022011221 is a wasteful number, since it uses less digits than its factorization.

121120022011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317979096 (or 1317979093 counting only the distinct ones).

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

Adding to 121120022011221 its reverse (122110220021121), we get a palindrome (243230242032342).

The spelling of 121120022011221 in words is "one hundred twenty-one trillion, one hundred twenty billion, twenty-two million, eleven thousand, two hundred twenty-one".