102210200002021 has 4 divisors (see below), whose sum is σ = 102254697261612. Its totient is φ = 102165702742432.

The previous prime is 102210200001997. The next prime is 102210200002067. The reversal of 102210200002021 is 120200002012201.

It is a happy number.

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 20874801521025 + 81335398480996 = 4568895^2 + 9018614^2 .

It is a cyclic number.

It is not a de Polignac number, because 102210200002021 - 2¹⁵ = 102210199969253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102210200001992 and 102210200002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102210200002121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22248626350 + ... + 22248630943.

It is an arithmetic number, because the mean of its divisors is an integer number (25563674315403).

Almost surely, 2^{102210200002021} is an apocalyptic number.

It is an amenable number.

102210200002021 is a deficient number, since it is larger than the sum of its proper divisors (44497259591).

102210200002021 is an equidigital number, since it uses as much as digits as its factorization.

102210200002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44497259590.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102210200002021 its reverse (120200002012201), we get a palindrome (222410202014222).

The spelling of 102210200002021 in words is "one hundred two trillion, two hundred ten billion, two hundred million, two thousand, twenty-one".