21121114124 has 24 divisors (see below), whose sum is σ = 40335031296. Its totient is φ = 9597434000.

The previous prime is 21121114117. The next prime is 21121114139. The reversal of 21121114124 is 42141112112.

It is a super-2 number, since 2×21121114124² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21121114096 and 21121114105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65189 + ... + 215619.

It is an arithmetic number, because the mean of its divisors is an integer number (1680626304).

Almost surely, 2^21121114124 is an apocalyptic number.

It is an amenable number.

21121114124 is a deficient number, since it is larger than the sum of its proper divisors (19213917172).

21121114124 is a wasteful number, since it uses less digits than its factorization.

21121114124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153637 (or 153635 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 21121114124 its reverse (42141112112), we get a palindrome (63262226236).

The spelling of 21121114124 in words is "twenty-one billion, one hundred twenty-one million, one hundred fourteen thousand, one hundred twenty-four".