21114113412 has 48 divisors (see below), whose sum is σ = 56481989760. Its totient is φ = 6013565952.

The previous prime is 21114113387. The next prime is 21114113417. The reversal of 21114113412 is 21431141112.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is not an unprimeable number, because it can be changed into a prime (21114113417) 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, 369837 + ... + 423092.

It is an arithmetic number, because the mean of its divisors is an integer number (1176708120).

Almost surely, 2^21114113412 is an apocalyptic number.

It is an amenable number.

21114113412 is an abundant number, since it is smaller than the sum of its proper divisors (35367876348).

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

21114113412 is a wasteful number, since it uses less digits than its factorization.

21114113412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793260 (or 793258 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

Adding to 21114113412 its reverse (21431141112), we get a palindrome (42545254524).

The spelling of 21114113412 in words is "twenty-one billion, one hundred fourteen million, one hundred thirteen thousand, four hundred twelve".