10200021111221 has 4 divisors (see below), whose sum is σ = 10352260232352. Its totient is φ = 10047781990092.

The previous prime is 10200021111197. The next prime is 10200021111251. The reversal of 10200021111221 is 12211112000201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10200021111221 - 2¹⁰ = 10200021110197 is a prime.

It is a super-2 number, since 2×10200021111221² (a number of 27 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 = 10200021111196 and 10200021111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10200021111251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76119560465 + ... + 76119560598.

It is an arithmetic number, because the mean of its divisors is an integer number (2588065058088).

Almost surely, 2^{10200021111221} is an apocalyptic number.

It is an amenable number.

10200021111221 is a deficient number, since it is larger than the sum of its proper divisors (152239121131).

10200021111221 is an equidigital number, since it uses as much as digits as its factorization.

10200021111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152239121130.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10200021111221 its reverse (12211112000201), we get a palindrome (22411133111422).

The spelling of 10200021111221 in words is "ten trillion, two hundred billion, twenty-one million, one hundred eleven thousand, two hundred twenty-one".