1201222221020 has 12 divisors (see below), whose sum is σ = 2522566664184. Its totient is φ = 480488888400.

The previous prime is 1201222221019. The next prime is 1201222221053. The reversal of 1201222221020 is 201222221021.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201222221020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30030555506 + ... + 30030555545.

It is an arithmetic number, because the mean of its divisors is an integer number (210213888682).

Almost surely, 2^{1201222221020} is an apocalyptic number.

1201222221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201222221020 is an abundant number, since it is smaller than the sum of its proper divisors (1321344443164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201222221020 is a wasteful number, since it uses less digits than its factorization.

1201222221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60061111060 (or 60061111058 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1201222221020 its reverse (201222221021), we get a palindrome (1402444442041).

Subtracting from 1201222221020 its reverse (201222221021), we obtain a palindrome (999999999999).

The spelling of 1201222221020 in words is "one trillion, two hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty".