12121700 has 36 divisors (see below), whose sum is σ = 26925360. Its totient is φ = 4734240.

The previous prime is 12121699. The next prime is 12121721. The reversal of 12121700 is 712121.

It is a super-2 number, since 2×12121700² = 293871221780000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2891 + ... + 5709.

Almost surely, 2^12121700 is an apocalyptic number.

12121700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13462680).

12121700 is an abundant number, since it is smaller than the sum of its proper divisors (14803660).

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

12121700 is a wasteful number, since it uses less digits than its factorization.

12121700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876 (or 2869 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 12121700 is about 3481.6231846655. The cubic root of 12121700 is about 229.7142007771.

Adding to 12121700 its reverse (712121), we get a palindrome (12833821).

It can be divided in two parts, 12121 and 700, that added together give a palindrome (12821).

The spelling of 12121700 in words is "twelve million, one hundred twenty-one thousand, seven hundred".