30002100131021 has 4 divisors (see below), whose sum is σ = 30733858670844. Its totient is φ = 29270341591200.

The previous prime is 30002100131011. The next prime is 30002100131053. The reversal of 30002100131021 is 12013100120003.

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 16461805009225 + 13540295121796 = 4057315^2 + 3679714^2 .

It is a cyclic number.

It is not a de Polignac number, because 30002100131021 - 2³⁰ = 30001026389197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30002100130987 and 30002100131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30002100131011) 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, 365879269850 + ... + 365879269931.

It is an arithmetic number, because the mean of its divisors is an integer number (7683464667711).

Almost surely, 2^{30002100131021} is an apocalyptic number.

It is an amenable number.

30002100131021 is a deficient number, since it is larger than the sum of its proper divisors (731758539823).

30002100131021 is an equidigital number, since it uses as much as digits as its factorization.

30002100131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731758539822.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 30002100131021 its reverse (12013100120003), we get a palindrome (42015200251024).

The spelling of 30002100131021 in words is "thirty trillion, two billion, one hundred million, one hundred thirty-one thousand, twenty-one".