121221201008 has 20 divisors (see below), whose sum is σ = 234884945568. Its totient is φ = 60605731200.

The previous prime is 121221201001. The next prime is 121221201029. The reversal of 121221201008 is 800102122121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221201001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94568 + ... + 501383.

Almost surely, 2^121221201008 is an apocalyptic number.

It is an amenable number.

121221201008 is a deficient number, since it is larger than the sum of its proper divisors (113663744560).

121221201008 is a wasteful number, since it uses less digits than its factorization.

121221201008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608672 (or 608666 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121221201008 its reverse (800102122121), we get a palindrome (921323323129).

The spelling of 121221201008 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred one thousand, eight".