1021111102201 has 6 divisors (see below), whose sum is σ = 1084709717870. Its totient is φ = 961045742976.

The previous prime is 1021111102189. The next prime is 1021111102373. The reversal of 1021111102201 is 1022011111201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 99225000000 + 921886102201 = 315000^2 + 960149^2 .

It is not a de Polignac number, because 1021111102201 - 2¹³ = 1021111094009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021111102601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1766627916 + ... + 1766628493.

Almost surely, 2^{1021111102201} is an apocalyptic number.

It is an amenable number.

1021111102201 is a deficient number, since it is larger than the sum of its proper divisors (63598615669).

1021111102201 is an equidigital number, since it uses as much as digits as its factorization.

1021111102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533256443 (or 3533256426 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021111102201 its reverse (1022011111201), we get a palindrome (2043122213402).

The spelling of 1021111102201 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred two thousand, two hundred one".