21310124611 has 16 divisors (see below), whose sum is σ = 22469690880. Its totient is φ = 20170941120.

The previous prime is 21310124609. The next prime is 21310124651. The reversal of 21310124611 is 11642101312.

It is not a de Polignac number, because 21310124611 - 2¹ = 21310124609 is a prime.

It is a super-3 number, since 3×21310124611³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310124651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 983551 + ... + 1004983.

It is an arithmetic number, because the mean of its divisors is an integer number (1404355680).

Almost surely, 2^21310124611 is an apocalyptic number.

21310124611 is a deficient number, since it is larger than the sum of its proper divisors (1159566269).

21310124611 is a wasteful number, since it uses less digits than its factorization.

21310124611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21906.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21310124611 its reverse (11642101312), we get a palindrome (32952225923).

The spelling of 21310124611 in words is "twenty-one billion, three hundred ten million, one hundred twenty-four thousand, six hundred eleven".