1020021200221 has 8 divisors (see below), whose sum is σ = 1041839445600. Its totient is φ = 998353946640.

The previous prime is 1020021200087. The next prime is 1020021200243. The reversal of 1020021200221 is 1220021200201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020021200221 - 2⁹ = 1020021199709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020021200521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37734295 + ... + 37761316.

It is an arithmetic number, because the mean of its divisors is an integer number (130229930700).

Almost surely, 2^{1020021200221} is an apocalyptic number.

It is an amenable number.

1020021200221 is a deficient number, since it is larger than the sum of its proper divisors (21818245379).

1020021200221 is an equidigital number, since it uses as much as digits as its factorization.

1020021200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75495899.

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

Adding to 1020021200221 its reverse (1220021200201), we get a palindrome (2240042400422).

The spelling of 1020021200221 in words is "one trillion, twenty billion, twenty-one million, two hundred thousand, two hundred twenty-one".