121206500 has 24 divisors (see below), whose sum is σ = 264716088. Its totient is φ = 48482400.

The previous prime is 121206439. The next prime is 121206511. The reversal of 121206500 is 5602121.

It can be written as a sum of positive squares in 4 ways, for example, as 602176 + 120604324 = 776^2 + 10982^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120707 + ... + 121706.

It is an arithmetic number, because the mean of its divisors is an integer number (11029837).

Almost surely, 2^121206500 is an apocalyptic number.

121206500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121206500 is an abundant number, since it is smaller than the sum of its proper divisors (143509588).

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

121206500 is a wasteful number, since it uses less digits than its factorization.

121206500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242432 (or 242420 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121206500 is about 11009.3823623308. The cubic root of 121206500 is about 494.8899527496.

Adding to 121206500 its reverse (5602121), we get a palindrome (126808621).

The spelling of 121206500 in words is "one hundred twenty-one million, two hundred six thousand, five hundred".