121112201000 has 64 divisors (see below), whose sum is σ = 323888647680. Its totient is φ = 41524180800.

The previous prime is 121112200903. The next prime is 121112201009. The reversal of 121112201000 is 102211121.

It is not an unprimeable number, because it can be changed into a prime (121112201009) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8643872 + ... + 8657871.

It is an arithmetic number, because the mean of its divisors is an integer number (5060760120).

Almost surely, 2^121112201000 is an apocalyptic number.

121112201000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112201000 is an abundant number, since it is smaller than the sum of its proper divisors (202776446680).

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

121112201000 is a wasteful number, since it uses less digits than its factorization.

121112201000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17301771 (or 17301757 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121112201000 its reverse (102211121), we get a palindrome (121214412121).

The spelling of 121112201000 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred one thousand".