1020201112221 has 16 divisors (see below), whose sum is σ = 1426756249344. Its totient is φ = 647672238144.

The previous prime is 1020201112153. The next prime is 1020201112279. The reversal of 1020201112221 is 1222111020201.

It is not a de Polignac number, because 1020201112221 - 2¹³ = 1020201104029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020201112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020201114221) 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, 97771390 + ... + 97781823.

It is an arithmetic number, because the mean of its divisors is an integer number (89172265584).

Almost surely, 2^{1020201112221} is an apocalyptic number.

It is an amenable number.

1020201112221 is a deficient number, since it is larger than the sum of its proper divisors (406555137123).

1020201112221 is a wasteful number, since it uses less digits than its factorization.

1020201112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195553300.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1020201112221 its reverse (1222111020201), we get a palindrome (2242312132422).

The spelling of 1020201112221 in words is "one trillion, twenty billion, two hundred one million, one hundred twelve thousand, two hundred twenty-one".