21411013124 has 6 divisors (see below), whose sum is σ = 37469272974. Its totient is φ = 10705506560.

The previous prime is 21411013123. The next prime is 21411013159. The reversal of 21411013124 is 42131011412.

It can be written as a sum of positive squares in only one way, i.e., 21106859524 + 304153600 = 145282^2 + 17440^2 .

It is a super-2 number, since 2×21411013124² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21411013096 and 21411013105.

It is not an unprimeable number, because it can be changed into a prime (21411013123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2676376637 + ... + 2676376644.

It is an arithmetic number, because the mean of its divisors is an integer number (6244878829).

Almost surely, 2^21411013124 is an apocalyptic number.

It is an amenable number.

21411013124 is a deficient number, since it is larger than the sum of its proper divisors (16058259850).

21411013124 is a wasteful number, since it uses less digits than its factorization.

21411013124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352753285 (or 5352753283 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21411013124 its reverse (42131011412), we get a palindrome (63542024536).

The spelling of 21411013124 in words is "twenty-one billion, four hundred eleven million, thirteen thousand, one hundred twenty-four".