2121100323303 has 24 divisors (see below), whose sum is σ = 3062538142032. Its totient is φ = 1305240887808.

The previous prime is 2121100323257. The next prime is 2121100323313. The reversal of 2121100323303 is 3033230011212.

It is not a de Polignac number, because 2121100323303 - 2¹⁶ = 2121100257767 is a prime.

It is a super-2 number, since 2×2121100323303² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121100323303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121100323313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15727425 + ... + 15861717.

It is an arithmetic number, because the mean of its divisors is an integer number (127605755918).

Almost surely, 2^{2121100323303} is an apocalyptic number.

2121100323303 is a deficient number, since it is larger than the sum of its proper divisors (941437818729).

2121100323303 is a wasteful number, since it uses less digits than its factorization.

2121100323303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165475 (or 165462 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 2121100323303 its reverse (3033230011212), we get a palindrome (5154330334515).

The spelling of 2121100323303 in words is "two trillion, one hundred twenty-one billion, one hundred million, three hundred twenty-three thousand, three hundred three".