121021021224 has 48 divisors (see below), whose sum is σ = 327793202100. Its totient is φ = 40336902144.

The previous prime is 121021021201. The next prime is 121021021237. The reversal of 121021021224 is 422120120121.

121021021224 is a `hidden beast` number, since 1 + 210 + 210 + 21 + 224 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 120291048900 + 729972324 = 346830^2 + 27018^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121021021197 and 121021021206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 863112 + ... + 993480.

Almost surely, 2^121021021224 is an apocalyptic number.

It is an amenable number.

121021021224 is an abundant number, since it is smaller than the sum of its proper divisors (206772180876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121021021224 is a wasteful number, since it uses less digits than its factorization.

121021021224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143274 (or 143267 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121021021224 its reverse (422120120121), we get a palindrome (543141141345).

The spelling of 121021021224 in words is "one hundred twenty-one billion, twenty-one million, twenty-one thousand, two hundred twenty-four".