2121434100203 has 32 divisors (see below), whose sum is σ = 2467466496000. Its totient is φ = 1805734062720.

The previous prime is 2121434100169. The next prime is 2121434100209. The reversal of 2121434100203 is 3020014341212.

It is a cyclic number.

It is not a de Polignac number, because 2121434100203 - 2²² = 2121429905899 is a prime.

It is a super-2 number, since 2×2121434100203² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121434100209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 985178 + ... + 2283296.

It is an arithmetic number, because the mean of its divisors is an integer number (77108328000).

Almost surely, 2^{2121434100203} is an apocalyptic number.

2121434100203 is a deficient number, since it is larger than the sum of its proper divisors (346032395797).

2121434100203 is a wasteful number, since it uses less digits than its factorization.

2121434100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298315.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2121434100203 its reverse (3020014341212), we get a palindrome (5141448441415).

The spelling of 2121434100203 in words is "two trillion, one hundred twenty-one billion, four hundred thirty-four million, one hundred thousand, two hundred three".