121000123100 has 72 divisors (see below), whose sum is σ = 278093169648. Its totient is φ = 45540275200.

The previous prime is 121000123081. The next prime is 121000123159. The reversal of 121000123100 is 1321000121.

It is a super-2 number, since 2×121000123100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 7967114 + ... + 7982286.

It is an arithmetic number, because the mean of its divisors is an integer number (3862405134).

Almost surely, 2^121000123100 is an apocalyptic number.

121000123100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000123100 is an abundant number, since it is smaller than the sum of its proper divisors (157093046548).

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

121000123100 is a wasteful number, since it uses less digits than its factorization.

121000123100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19895 (or 19888 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 121000123100 its reverse (1321000121), we get a palindrome (122321123221).

The spelling of 121000123100 in words is "one hundred twenty-one billion, one hundred twenty-three thousand, one hundred".