1021201000221 has 16 divisors (see below), whose sum is σ = 1398541211648. Its totient is φ = 662334408000.

The previous prime is 1021201000217. The next prime is 1021201000223. The reversal of 1021201000221 is 1220001021201.

It is not a de Polignac number, because 1021201000221 - 2² = 1021201000217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021201000197 and 1021201000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021201000223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667371 + ... + 1577271.

It is an arithmetic number, because the mean of its divisors is an integer number (87408825728).

Almost surely, 2^{1021201000221} is an apocalyptic number.

It is an amenable number.

1021201000221 is a deficient number, since it is larger than the sum of its proper divisors (377340211427).

1021201000221 is a wasteful number, since it uses less digits than its factorization.

1021201000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920052.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1021201000221 its reverse (1220001021201), we get a palindrome (2241202021422).

The spelling of 1021201000221 in words is "one trillion, twenty-one billion, two hundred one million, two hundred twenty-one", and thus it is an aban number.