121201100 has 18 divisors (see below), whose sum is σ = 263006604. Its totient is φ = 48480400.

The previous prime is 121201051. The next prime is 121201117. The reversal of 121201100 is 1102121.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605906 + ... + 606105.

It is an arithmetic number, because the mean of its divisors is an integer number (14611478).

Almost surely, 2^121201100 is an apocalyptic number.

121201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201100 is an abundant number, since it is smaller than the sum of its proper divisors (141805504).

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

121201100 is a wasteful number, since it uses less digits than its factorization.

121201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212025 (or 1212018 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121201100 is about 11009.1371142338. The cubic root of 121201100 is about 494.8826031838.

Adding to 121201100 its reverse (1102121), we get a palindrome (122303221).

The spelling of 121201100 in words is "one hundred twenty-one million, two hundred one thousand, one hundred".