20202003001221 has 4 divisors (see below), whose sum is σ = 26936004001632. Its totient is φ = 13468002000812.

The previous prime is 20202003001199. The next prime is 20202003001237. The reversal of 20202003001221 is 12210030020202.

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 20202003001221 - 2⁶ = 20202003001157 is a prime.

It is a super-2 number, since 2×20202003001221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20202003001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202003002221) 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, 3367000500201 + ... + 3367000500206.

It is an arithmetic number, because the mean of its divisors is an integer number (6734001000408).

Almost surely, 2^{20202003001221} is an apocalyptic number.

It is an amenable number.

20202003001221 is a deficient number, since it is larger than the sum of its proper divisors (6734001000411).

20202003001221 is an equidigital number, since it uses as much as digits as its factorization.

20202003001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734001000410.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20202003001221 its reverse (12210030020202), we get a palindrome (32412033021423).

The spelling of 20202003001221 in words is "twenty trillion, two hundred two billion, three million, one thousand, two hundred twenty-one".