121020320100 has 36 divisors (see below), whose sum is σ = 350152127024. Its totient is φ = 32272085280.

The previous prime is 121020320077. The next prime is 121020320111. The reversal of 121020320100 is 1023020121.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 11 ways as a sum of consecutive naturals, for example, 201700234 + ... + 201700833.

Almost surely, 2^121020320100 is an apocalyptic number.

121020320100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020320100 is an abundant number, since it is smaller than the sum of its proper divisors (229131806924).

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

121020320100 is a wasteful number, since it uses less digits than its factorization.

121020320100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403401084 (or 403401077 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 121020320100 its reverse (1023020121), we get a palindrome (122043340221).

The spelling of 121020320100 in words is "one hundred twenty-one billion, twenty million, three hundred twenty thousand, one hundred".