30101101021 has 4 divisors (see below), whose sum is σ = 30102509052. Its totient is φ = 30099692992.

The previous prime is 30101101001. The next prime is 30101101061. The reversal of 30101101021 is 12010110103.

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 4888107225 + 25212993796 = 69915^2 + 158786^2 .

It is a cyclic number.

It is not a de Polignac number, because 30101101021 - 2⁷ = 30101100893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30101100989 and 30101101007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30101101001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671446 + ... + 714871.

It is an arithmetic number, because the mean of its divisors is an integer number (7525627263).

Almost surely, 2^30101101021 is an apocalyptic number.

It is an amenable number.

30101101021 is a deficient number, since it is larger than the sum of its proper divisors (1408031).

30101101021 is a wasteful number, since it uses less digits than its factorization.

30101101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408030.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 30101101021 its reverse (12010110103), we get a palindrome (42111211124).

It can be divided in two parts, 3010110102 and 1, that added together give a palindrome (3010110103).

The spelling of 30101101021 in words is "thirty billion, one hundred one million, one hundred one thousand, twenty-one".