1202020100221 has 4 divisors (see below), whose sum is σ = 1206488576700. Its totient is φ = 1197551623744.

The previous prime is 1202020100207. The next prime is 1202020100227. The reversal of 1202020100221 is 1220010202021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 286879143321 + 915140956900 = 535611^2 + 956630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202020100221 - 2¹⁵ = 1202020067453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202020100227) 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, 2234237836 + ... + 2234238373.

It is an arithmetic number, because the mean of its divisors is an integer number (301622144175).

Almost surely, 2^{1202020100221} is an apocalyptic number.

It is an amenable number.

1202020100221 is a deficient number, since it is larger than the sum of its proper divisors (4468476479).

1202020100221 is an equidigital number, since it uses as much as digits as its factorization.

1202020100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4468476478.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1202020100221 its reverse (1220010202021), we get a palindrome (2422030302242).

The spelling of 1202020100221 in words is "one trillion, two hundred two billion, twenty million, one hundred thousand, two hundred twenty-one".