30203121203221 has 4 divisors (see below), whose sum is σ = 30206323070092. Its totient is φ = 30199919336352.

The previous prime is 30203121203209. The next prime is 30203121203239. The reversal of 30203121203221 is 12230212130203.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16519144140625 + 13683977062596 = 4064375^2 + 3699186^2 .

It is a cyclic number.

It is not a de Polignac number, because 30203121203221 - 2³¹ = 30200973719573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30203121203192 and 30203121203201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30203121203251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600919286 + ... + 1600938151.

It is an arithmetic number, because the mean of its divisors is an integer number (7551580767523).

Almost surely, 2^{30203121203221} is an apocalyptic number.

It is an amenable number.

30203121203221 is a deficient number, since it is larger than the sum of its proper divisors (3201866871).

30203121203221 is an equidigital number, since it uses as much as digits as its factorization.

30203121203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201866870.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 30203121203221 its reverse (12230212130203), we get a palindrome (42433333333424).

The spelling of 30203121203221 in words is "thirty trillion, two hundred three billion, one hundred twenty-one million, two hundred three thousand, two hundred twenty-one".