21313203120 has 120 divisors (see below), whose sum is σ = 78083854992. Its totient is φ = 5166835200.

The previous prime is 21313203101. The next prime is 21313203137. The reversal of 21313203120 is 2130231312.

21313203120 is a `hidden beast` number, since 2 + 1 + 31 + 320 + 312 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21313203093 and 21313203102.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1337611 + ... + 1353450.

Almost surely, 2^21313203120 is an apocalyptic number.

21313203120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21313203120 is an abundant number, since it is smaller than the sum of its proper divisors (56770651872).

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

21313203120 is a wasteful number, since it uses less digits than its factorization.

21313203120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691091 (or 2691082 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21313203120 its reverse (2130231312), we get a palindrome (23443434432).

The spelling of 21313203120 in words is "twenty-one billion, three hundred thirteen million, two hundred three thousand, one hundred twenty".