11203134340021 has 4 divisors (see below), whose sum is σ = 12064913904652. Its totient is φ = 10341354775392.

The previous prime is 11203134339983. The next prime is 11203134340049. The reversal of 11203134340021 is 12004343130211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7035697895121 + 4167436444900 = 2652489^2 + 2041430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11203134340021 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 (11203134340421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430889782296 + ... + 430889782321.

It is an arithmetic number, because the mean of its divisors is an integer number (3016228476163).

Almost surely, 2^{11203134340021} is an apocalyptic number.

It is an amenable number.

11203134340021 is a deficient number, since it is larger than the sum of its proper divisors (861779564631).

11203134340021 is an equidigital number, since it uses as much as digits as its factorization.

11203134340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861779564630.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 11203134340021 its reverse (12004343130211), we get a palindrome (23207477470232).

The spelling of 11203134340021 in words is "eleven trillion, two hundred three billion, one hundred thirty-four million, three hundred forty thousand, twenty-one".