30202221131221 has 4 divisors (see below), whose sum is σ = 31978822374252. Its totient is φ = 28425619888192.

The previous prime is 30202221131213. The next prime is 30202221131227. The reversal of 30202221131221 is 12213112220203.

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 10448765327025 + 19753455804196 = 3232455^2 + 4444486^2 .

It is a cyclic number.

It is not a de Polignac number, because 30202221131221 - 2³ = 30202221131213 is a prime.

It is a super-2 number, since 2×30202221131221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30202221131192 and 30202221131201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30202221131227) 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, 888300621490 + ... + 888300621523.

It is an arithmetic number, because the mean of its divisors is an integer number (7994705593563).

Almost surely, 2^{30202221131221} is an apocalyptic number.

It is an amenable number.

30202221131221 is a deficient number, since it is larger than the sum of its proper divisors (1776601243031).

30202221131221 is a wasteful number, since it uses less digits than its factorization.

30202221131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776601243030.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 30202221131221 its reverse (12213112220203), we get a palindrome (42415333351424).

The spelling of 30202221131221 in words is "thirty trillion, two hundred two billion, two hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty-one".