30002331220021 has 4 divisors (see below), whose sum is σ = 30003598394572. Its totient is φ = 30001064045472.

The previous prime is 30002331220013. The next prime is 30002331220027. The reversal of 30002331220021 is 12002213320003.

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 16026322817521 + 13976008402500 = 4003289^2 + 3738450^2 .

It is a cyclic number.

It is not a de Polignac number, because 30002331220021 - 2³ = 30002331220013 is a prime.

It is a super-2 number, since 2×30002331220021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30002331220027) 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, 633551760 + ... + 633599113.

It is an arithmetic number, because the mean of its divisors is an integer number (7500899598643).

Almost surely, 2^{30002331220021} is an apocalyptic number.

It is an amenable number.

30002331220021 is a deficient number, since it is larger than the sum of its proper divisors (1267174551).

30002331220021 is a wasteful number, since it uses less digits than its factorization.

30002331220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267174550.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 30002331220021 its reverse (12002213320003), we get a palindrome (42004544540024).

The spelling of 30002331220021 in words is "thirty trillion, two billion, three hundred thirty-one million, two hundred twenty thousand, twenty-one".