21130224001 has 4 divisors (see below), whose sum is σ = 22373178372. Its totient is φ = 19887269632.

The previous prime is 21130223953. The next prime is 21130224041. The reversal of 21130224001 is 10042203112.

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 15251015025 + 5879208976 = 123495^2 + 76676^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130224001 - 2⁹ = 21130223489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21130224041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621477160 + ... + 621477193.

It is an arithmetic number, because the mean of its divisors is an integer number (5593294593).

Almost surely, 2^21130224001 is an apocalyptic number.

It is an amenable number.

21130224001 is a deficient number, since it is larger than the sum of its proper divisors (1242954371).

21130224001 is a wasteful number, since it uses less digits than its factorization.

21130224001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242954370.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21130224001 its reverse (10042203112), we get a palindrome (31172427113).

The spelling of 21130224001 in words is "twenty-one billion, one hundred thirty million, two hundred twenty-four thousand, one".