30021021001 has 4 divisors (see below), whose sum is σ = 30022516372. Its totient is φ = 30019525632.

The previous prime is 30021020983. The next prime is 30021021007. The reversal of 30021021001 is 10012012003.

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 6473811600 + 23547209401 = 80460^2 + 153451^2 .

It is a cyclic number.

It is not a de Polignac number, because 30021021001 - 2¹⁵ = 30020988233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30021021007) 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, 717156 + ... + 757861.

It is an arithmetic number, because the mean of its divisors is an integer number (7505629093).

Almost surely, 2^30021021001 is an apocalyptic number.

It is an amenable number.

30021021001 is a deficient number, since it is larger than the sum of its proper divisors (1495371).

30021021001 is a wasteful number, since it uses less digits than its factorization.

30021021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495370.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 30021021001 its reverse (10012012003), we get a palindrome (40033033004).

The spelling of 30021021001 in words is "thirty billion, twenty-one million, twenty-one thousand, one".