2121201220203 has 96 divisors (see below), whose sum is σ = 3451908096000. Its totient is φ = 1246277560320.

The previous prime is 2121201220199. The next prime is 2121201220247. The reversal of 2121201220203 is 3020221021212.

2121201220203 is a `hidden beast` number, since 21 + 21 + 201 + 220 + 203 = 666.

It is not a de Polignac number, because 2121201220203 - 2² = 2121201220199 is a prime.

It is a super-2 number, since 2×2121201220203² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121201220283) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 541258878 + ... + 541262796.

It is an arithmetic number, because the mean of its divisors is an integer number (35957376000).

Almost surely, 2^{2121201220203} is an apocalyptic number.

2121201220203 is a deficient number, since it is larger than the sum of its proper divisors (1330706875797).

2121201220203 is a wasteful number, since it uses less digits than its factorization.

2121201220203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5937 (or 5934 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2121201220203 its reverse (3020221021212), we get a palindrome (5141422241415).

The spelling of 2121201220203 in words is "two trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty thousand, two hundred three".