2121103453 has 8 divisors (see below), whose sum is σ = 2435608640. Its totient is φ = 1809470880.

The previous prime is 2121103433. The next prime is 2121103499. The reversal of 2121103453 is 3543011212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121103453 - 2¹³ = 2121095261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121103423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716568 + ... + 719521.

It is an arithmetic number, because the mean of its divisors is an integer number (304451080).

Almost surely, 2^2121103453 is an apocalyptic number.

It is an amenable number.

2121103453 is a deficient number, since it is larger than the sum of its proper divisors (314505187).

2121103453 is a wasteful number, since it uses less digits than its factorization.

2121103453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436307.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2121103453 is about 46055.4389079075. The cubic root of 2121103453 is about 1284.8545012325.

Adding to 2121103453 its reverse (3543011212), we get a palindrome (5664114665).

The spelling of 2121103453 in words is "two billion, one hundred twenty-one million, one hundred three thousand, four hundred fifty-three".