121021222008 has 128 divisors (see below), whose sum is σ = 309434529600. Its totient is φ = 39436222464.

The previous prime is 121021221977. The next prime is 121021222009. The reversal of 121021222008 is 800222120121.

It is a super-2 number, since 2×121021222008² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021222009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73035516 + ... + 73037172.

Almost surely, 2^121021222008 is an apocalyptic number.

It is an amenable number.

121021222008 is an abundant number, since it is smaller than the sum of its proper divisors (188413307592).

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

121021222008 is a wasteful number, since it uses less digits than its factorization.

121021222008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129 (or 2125 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121021222008 its reverse (800222120121), we get a palindrome (921243342129).

The spelling of 121021222008 in words is "one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, eight".