121120221001221 has 48 divisors (see below), whose sum is σ = 191066055852672. Its totient is φ = 73484504553600.

The previous prime is 121120221001181. The next prime is 121120221001229. The reversal of 121120221001221 is 122100122021121.

121120221001221 is a `hidden beast` number, since 1 + 211 + 20 + 2 + 210 + 0 + 1 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-121120221001221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121120221001194 and 121120221001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120221001229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 936724051 + ... + 936853343.

It is an arithmetic number, because the mean of its divisors is an integer number (3980542830264).

Almost surely, 2^{121120221001221} is an apocalyptic number.

It is an amenable number.

121120221001221 is a deficient number, since it is larger than the sum of its proper divisors (69945834851451).

121120221001221 is a wasteful number, since it uses less digits than its factorization.

121120221001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242154 (or 242151 counting only the distinct ones).

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

Adding to 121120221001221 its reverse (122100122021121), we get a palindrome (243220343022342).

The spelling of 121120221001221 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, one thousand, two hundred twenty-one".