21131314224 has 40 divisors (see below), whose sum is σ = 55358099712. Its totient is φ = 6944562240.

The previous prime is 21131314213. The next prime is 21131314301. The reversal of 21131314224 is 42241313112.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 = 21131314194 and 21131314203.

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, 3096844 + ... + 3103659.

Almost surely, 2^21131314224 is an apocalyptic number.

21131314224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21131314224 is an abundant number, since it is smaller than the sum of its proper divisors (34226785488).

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

21131314224 is a wasteful number, since it uses less digits than its factorization.

21131314224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200585 (or 6200579 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 21131314224 its reverse (42241313112), we get a palindrome (63372627336).

The spelling of 21131314224 in words is "twenty-one billion, one hundred thirty-one million, three hundred fourteen thousand, two hundred twenty-four".