21310451041 has 4 divisors (see below), whose sum is σ = 23247764784. Its totient is φ = 19373137300.

The previous prime is 21310451023. The next prime is 21310451083. The reversal of 21310451041 is 14015401312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21310451041 - 2⁵ = 21310451009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310451941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968656855 + ... + 968656876.

It is an arithmetic number, because the mean of its divisors is an integer number (5811941196).

Almost surely, 2^21310451041 is an apocalyptic number.

It is an amenable number.

21310451041 is a deficient number, since it is larger than the sum of its proper divisors (1937313743).

21310451041 is a wasteful number, since it uses less digits than its factorization.

21310451041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937313742.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 21310451041 its reverse (14015401312), we get a palindrome (35325852353).

The spelling of 21310451041 in words is "twenty-one billion, three hundred ten million, four hundred fifty-one thousand, forty-one".