1021220201108 has 12 divisors (see below), whose sum is σ = 1787169984180. Its totient is φ = 510600205632.

The previous prime is 1021220201101. The next prime is 1021220201117. The reversal of 1021220201108 is 8011020221201.

It can be written as a sum of positive squares in 2 ways, for example, as 987423790864 + 33796410244 = 993692^2 + 183838^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1021220201108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220201101) 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, 2239043 + ... + 2656266.

It is an arithmetic number, because the mean of its divisors is an integer number (148930832015).

Almost surely, 2^{1021220201108} is an apocalyptic number.

It is an amenable number.

1021220201108 is a deficient number, since it is larger than the sum of its proper divisors (765949783072).

1021220201108 is a wasteful number, since it uses less digits than its factorization.

1021220201108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4947466 (or 4947464 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 1021220201108 its reverse (8011020221201), we get a palindrome (9032240422309).

The spelling of 1021220201108 in words is "one trillion, twenty-one billion, two hundred twenty million, two hundred one thousand, one hundred eight".