11375254021 has 4 divisors (see below), whose sum is σ = 11397088044. Its totient is φ = 11353420000.

The previous prime is 11375253991. The next prime is 11375254043. The reversal of 11375254021 is 12045257311.

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 6556950625 + 4818303396 = 80975^2 + 69414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11375254021 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11375254091) 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, 10916230 + ... + 10917271.

It is an arithmetic number, because the mean of its divisors is an integer number (2849272011).

Almost surely, 2^11375254021 is an apocalyptic number.

It is an amenable number.

11375254021 is a deficient number, since it is larger than the sum of its proper divisors (21834023).

11375254021 is an equidigital number, since it uses as much as digits as its factorization.

11375254021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21834022.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 11375254021 in words is "eleven billion, three hundred seventy-five million, two hundred fifty-four thousand, twenty-one".