121165120200 has 48 divisors (see below), whose sum is σ = 375611874480. Its totient is φ = 32310698560.

The previous prime is 121165120159. The next prime is 121165120201. The reversal of 121165120200 is 2021561121.

It is not an unprimeable number, because it can be changed into a prime (121165120201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100970334 + ... + 100971533.

It is an arithmetic number, because the mean of its divisors is an integer number (7825247385).

Almost surely, 2^121165120200 is an apocalyptic number.

121165120200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121165120200 is an abundant number, since it is smaller than the sum of its proper divisors (254446754280).

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

121165120200 is a wasteful number, since it uses less digits than its factorization.

121165120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201941886 (or 201941877 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 121165120200 its reverse (2021561121), we get a palindrome (123186681321).

The spelling of 121165120200 in words is "one hundred twenty-one billion, one hundred sixty-five million, one hundred twenty thousand, two hundred".