21114120040 has 64 divisors (see below), whose sum is σ = 51924821760. Its totient is φ = 7679612160.

The previous prime is 21114120011. The next prime is 21114120047. The reversal of 21114120040 is 4002141112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21114119996 and 21114120023.

It is not an unprimeable number, because it can be changed into a prime (21114120047) 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, 268176 + ... + 337855.

It is an arithmetic number, because the mean of its divisors is an integer number (811325340).

Almost surely, 2^21114120040 is an apocalyptic number.

21114120040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21114120040 is an abundant number, since it is smaller than the sum of its proper divisors (30810701720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21114120040 is a wasteful number, since it uses less digits than its factorization.

21114120040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606122 (or 606118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21114120040 its reverse (4002141112), we get a palindrome (25116261152).

The spelling of 21114120040 in words is "twenty-one billion, one hundred fourteen million, one hundred twenty thousand, forty".