21130122443 has 8 divisors (see below), whose sum is σ = 23094783360. Its totient is φ = 19245651840.

The previous prime is 21130122437. The next prime is 21130122451. The reversal of 21130122443 is 34422103112.

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

It is a cyclic number.

It is not a de Polignac number, because 21130122443 - 2⁴ = 21130122427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130122413) 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, 20047028 + ... + 20048081.

It is an arithmetic number, because the mean of its divisors is an integer number (2886847920).

Almost surely, 2^21130122443 is an apocalyptic number.

21130122443 is a deficient number, since it is larger than the sum of its proper divisors (1964660917).

21130122443 is a wasteful number, since it uses less digits than its factorization.

21130122443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40095157.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21130122443 its reverse (34422103112), we get a palindrome (55552225555).

The spelling of 21130122443 in words is "twenty-one billion, one hundred thirty million, one hundred twenty-two thousand, four hundred forty-three".