243121244100 has 144 divisors (see below), whose sum is σ = 804707828736. Its totient is φ = 55516176000.

The previous prime is 243121244099. The next prime is 243121244123. The reversal of 243121244100 is 1442121342.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2108955 + ... + 2221245.

Almost surely, 2^243121244100 is an apocalyptic number.

243121244100 is a gapful number since it is divisible by the number (20) 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 243121244100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402353914368).

243121244100 is an abundant number, since it is smaller than the sum of its proper divisors (561586584636).

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

243121244100 is a wasteful number, since it uses less digits than its factorization.

243121244100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113346 (or 113339 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 243121244100 its reverse (1442121342), we get a palindrome (244563365442).

The spelling of 243121244100 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-four thousand, one hundred".