30201200021 has 2 divisors, whose sum is σ = 30201200022. Its totient is φ = 30201200020.

The previous prime is 30201199999. The next prime is 30201200063. The reversal of 30201200021 is 12000210203.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18160527121 + 12040672900 = 134761^2 + 109730^2 .

It is a cyclic number.

It is not a de Polignac number, because 30201200021 - 2³⁰ = 29127458197 is a prime.

It is a super-2 number, since 2×30201200021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30201199975 and 30201200011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30201230021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15100600010 + 15100600011.

It is an arithmetic number, because the mean of its divisors is an integer number (15100600011).

Almost surely, 2^30201200021 is an apocalyptic number.

It is an amenable number.

30201200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30201200021 is an equidigital number, since it uses as much as digits as its factorization.

30201200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 30201200021 its reverse (12000210203), we get a palindrome (42201410224).

The spelling of 30201200021 in words is "thirty billion, two hundred one million, two hundred thousand, twenty-one".