102003002002021 has 4 divisors (see below), whose sum is σ = 102004513740172. Its totient is φ = 102001490263872.

The previous prime is 102003002001961. The next prime is 102003002002081. The reversal of 102003002002021 is 120200200300201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (102003002001961) and next prime (102003002002081).

It can be written as a sum of positive squares in 2 ways, for example, as 32450237573121 + 69552764428900 = 5696511^2 + 8339830^2 .

It is a cyclic number.

It is not a de Polignac number, because 102003002002021 - 2²⁹ = 102002465131109 is a prime.

It is a super-2 number, since 2×102003002002021² (a number of 29 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 = 102003002001992 and 102003002002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102003002002081) 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, 755767860 + ... + 755902813.

It is an arithmetic number, because the mean of its divisors is an integer number (25501128435043).

Almost surely, 2^{102003002002021} is an apocalyptic number.

It is an amenable number.

102003002002021 is a deficient number, since it is larger than the sum of its proper divisors (1511738151).

102003002002021 is an equidigital number, since it uses as much as digits as its factorization.

102003002002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511738150.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 102003002002021 its reverse (120200200300201), we get a palindrome (222203202302222).

The spelling of 102003002002021 in words is "one hundred two trillion, three billion, two million, two thousand, twenty-one".