200102102010221 has 4 divisors (see below), whose sum is σ = 200125004857692. Its totient is φ = 200079199162752.

The previous prime is 200102102010197. The next prime is 200102102010241. The reversal of 200102102010221 is 122010201201002.

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 88908662281321 + 111193439728900 = 9429139^2 + 10544830^2 .

It is a cyclic number.

It is not a de Polignac number, because 200102102010221 - 2¹⁸ = 200102101748077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200102102010196 and 200102102010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200102102010241) 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, 11451410630 + ... + 11451428103.

It is an arithmetic number, because the mean of its divisors is an integer number (50031251214423).

Almost surely, 2^{200102102010221} is an apocalyptic number.

It is an amenable number.

200102102010221 is a deficient number, since it is larger than the sum of its proper divisors (22902847471).

200102102010221 is an equidigital number, since it uses as much as digits as its factorization.

200102102010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22902847470.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 200102102010221 its reverse (122010201201002), we get a palindrome (322112303211223).

The spelling of 200102102010221 in words is "two hundred trillion, one hundred two billion, one hundred two million, ten thousand, two hundred twenty-one".