1201020212221 has 4 divisors (see below), whose sum is σ = 1239762799744. Its totient is φ = 1162277624700.

The previous prime is 1201020212207. The next prime is 1201020212309. The reversal of 1201020212221 is 1222120201021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201020212221 - 2⁹ = 1201020211709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201020212195 and 1201020212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201020212201) 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, 19371293715 + ... + 19371293776.

It is an arithmetic number, because the mean of its divisors is an integer number (309940699936).

Almost surely, 2^{1201020212221} is an apocalyptic number.

It is an amenable number.

1201020212221 is a deficient number, since it is larger than the sum of its proper divisors (38742587523).

1201020212221 is an equidigital number, since it uses as much as digits as its factorization.

1201020212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38742587522.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1201020212221 its reverse (1222120201021), we get a palindrome (2423140413242).

The spelling of 1201020212221 in words is "one trillion, two hundred one billion, twenty million, two hundred twelve thousand, two hundred twenty-one".