21411142123 has 24 divisors (see below), whose sum is σ = 26023092480. Its totient is φ = 17253503280.

The previous prime is 21411142043. The next prime is 21411142127. The reversal of 21411142123 is 32124111412.

It is not a de Polignac number, because 21411142123 - 2¹⁷ = 21411011051 is a prime.

It is a super-2 number, since 2×21411142123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21411142094 and 21411142103.

It is not an unprimeable number, because it can be changed into a prime (21411142127) 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 23 ways as a sum of consecutive naturals, for example, 298698 + ... + 363376.

It is an arithmetic number, because the mean of its divisors is an integer number (1084295520).

Almost surely, 2^21411142123 is an apocalyptic number.

21411142123 is a deficient number, since it is larger than the sum of its proper divisors (4611950357).

21411142123 is a wasteful number, since it uses less digits than its factorization.

21411142123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64855 (or 64836 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

Adding to 21411142123 its reverse (32124111412), we get a palindrome (53535253535).

The spelling of 21411142123 in words is "twenty-one billion, four hundred eleven million, one hundred forty-two thousand, one hundred twenty-three".