21310441031 has 4 divisors (see below), whose sum is σ = 23247753864. Its totient is φ = 19373128200.

The previous prime is 21310441027. The next prime is 21310441043. The reversal of 21310441031 is 13014401312.

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

It is a cyclic number.

It is not a de Polignac number, because 21310441031 - 2² = 21310441027 is a prime.

It is a super-2 number, since 2×21310441031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21310440994 and 21310441012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310441051) 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, 968656400 + ... + 968656421.

It is an arithmetic number, because the mean of its divisors is an integer number (5811938466).

Almost surely, 2^21310441031 is an apocalyptic number.

21310441031 is a deficient number, since it is larger than the sum of its proper divisors (1937312833).

21310441031 is a wasteful number, since it uses less digits than its factorization.

21310441031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937312832.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21310441031 its reverse (13014401312), we get a palindrome (34324842343).

The spelling of 21310441031 in words is "twenty-one billion, three hundred ten million, four hundred forty-one thousand, thirty-one".