21124454114 has 16 divisors (see below), whose sum is σ = 31953262752. Its totient is φ = 10473660288.

The previous prime is 21124454107. The next prime is 21124454119. The reversal of 21124454114 is 41145442112.

It is a super-2 number, since 2×21124454114² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21124454119) 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 7 ways as a sum of consecutive naturals, for example, 71282 + ... + 217554.

It is an arithmetic number, because the mean of its divisors is an integer number (1997078922).

Almost surely, 2^21124454114 is an apocalyptic number.

21124454114 is a deficient number, since it is larger than the sum of its proper divisors (10828808638).

21124454114 is a wasteful number, since it uses less digits than its factorization.

21124454114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146881.

The product of its digits is 5120, while the sum is 29.

Adding to 21124454114 its reverse (41145442112), we get a palindrome (62269896226).

The spelling of 21124454114 in words is "twenty-one billion, one hundred twenty-four million, four hundred fifty-four thousand, one hundred fourteen".