201302030310021 has 20 divisors (see below), whose sum is σ = 300710822059692. Its totient is φ = 134201183185728.

The previous prime is 201302030309981. The next prime is 201302030310067. The reversal of 201302030310021 is 120013030203102.

201302030310021 is a `hidden beast` number, since 2 + 0 + 1 + 302 + 0 + 30 + 310 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 57802354961796 + 143499675348225 = 7602786^2 + 11979135^2 .

It is not a de Polignac number, because 201302030310021 - 2²² = 201302026115717 is a prime.

It is a super-2 number, since 2×201302030310021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201302030309976 and 201302030310003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201302030310071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 122634921 + ... + 124265553.

Almost surely, 2^{201302030310021} is an apocalyptic number.

It is an amenable number.

201302030310021 is a deficient number, since it is larger than the sum of its proper divisors (99408791749671).

201302030310021 is a wasteful number, since it uses less digits than its factorization.

201302030310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154722 (or 3154713 counting only the distinct ones).

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

Adding to 201302030310021 its reverse (120013030203102), we get a palindrome (321315060513123).

The spelling of 201302030310021 in words is "two hundred one trillion, three hundred two billion, thirty million, three hundred ten thousand, twenty-one".