212121200203 has 16 divisors (see below), whose sum is σ = 247442934240. Its totient is φ = 179697088000.

The previous prime is 212121200201. The next prime is 212121200231. The reversal of 212121200203 is 302002121212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212121200203 - 2¹ = 212121200201 is a prime.

It is a super-2 number, since 2×212121200203² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212121200201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5596648 + ... + 5634421.

It is an arithmetic number, because the mean of its divisors is an integer number (15465183390).

Almost surely, 2^212121200203 is an apocalyptic number.

212121200203 is a deficient number, since it is larger than the sum of its proper divisors (35321734037).

212121200203 is a wasteful number, since it uses less digits than its factorization.

212121200203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11231198.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212121200203 its reverse (302002121212), we get a palindrome (514123321415).

The spelling of 212121200203 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred thousand, two hundred three".