2201210002021 has 4 divisors (see below), whose sum is σ = 2201213054700. Its totient is φ = 2201206949344.

The previous prime is 2201210002007. The next prime is 2201210002027. The reversal of 2201210002021 is 1202000121022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 365764896225 + 1835445105796 = 604785^2 + 1354786^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201210002021 - 2¹⁵ = 2201209969253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201210001992 and 2201210002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201210002027) 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, 225465 + ... + 2110273.

It is an arithmetic number, because the mean of its divisors is an integer number (550303263675).

Almost surely, 2^{2201210002021} is an apocalyptic number.

It is an amenable number.

2201210002021 is a deficient number, since it is larger than the sum of its proper divisors (3052679).

2201210002021 is a wasteful number, since it uses less digits than its factorization.

2201210002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052678.

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

Adding to 2201210002021 its reverse (1202000121022), we get a palindrome (3403210123043).

The spelling of 2201210002021 in words is "two trillion, two hundred one billion, two hundred ten million, two thousand, twenty-one".