2121121102200 has 48 divisors (see below), whose sum is σ = 6575475418680. Its totient is φ = 565632293760.

The previous prime is 2121121102169. The next prime is 2121121102201. The reversal of 2121121102200 is 22011211212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2121121102200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121121102201) 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, 1767600319 + ... + 1767601518.

Almost surely, 2^{2121121102200} is an apocalyptic number.

2121121102200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121121102200 is an abundant number, since it is smaller than the sum of its proper divisors (4454354316480).

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

2121121102200 is a wasteful number, since it uses less digits than its factorization.

2121121102200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535201856 (or 3535201847 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121121102200 its reverse (22011211212), we get a palindrome (2143132313412).

The spelling of 2121121102200 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, two hundred".