21301203031020 has 144 divisors (see below), whose sum is σ = 70489221802272. Its totient is φ = 5163810462720.

The previous prime is 21301203030977. The next prime is 21301203031027. The reversal of 21301203031020 is 2013030210312.

21301203031020 is a `hidden beast` number, since 2 + 1 + 301 + 2 + 0 + 30 + 310 + 20 = 666.

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 = 21301203030984 and 21301203031002.

It is not an unprimeable number, because it can be changed into a prime (21301203031027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 113504784 + ... + 113692296.

It is an arithmetic number, because the mean of its divisors is an integer number (489508484738).

Almost surely, 2^{21301203031020} is an apocalyptic number.

21301203031020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301203031020 is an abundant number, since it is smaller than the sum of its proper divisors (49188018771252).

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

21301203031020 is a wasteful number, since it uses less digits than its factorization.

21301203031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244912 (or 244907 counting only the distinct ones).

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

Adding to 21301203031020 its reverse (2013030210312), we get a palindrome (23314233241332).

The spelling of 21301203031020 in words is "twenty-one trillion, three hundred one billion, two hundred three million, thirty-one thousand, twenty".