20212221121003 has 4 divisors (see below), whose sum is σ = 20228024266240. Its totient is φ = 20196417975768.

The previous prime is 20212221120893. The next prime is 20212221121009. The reversal of 20212221121003 is 30012112221202.

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

It is a cyclic number.

It is not a de Polignac number, because 20212221121003 - 2³³ = 20203631186411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212221121009) 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, 7901570700 + ... + 7901573257.

It is an arithmetic number, because the mean of its divisors is an integer number (5057006066560).

Almost surely, 2^{20212221121003} is an apocalyptic number.

20212221121003 is a deficient number, since it is larger than the sum of its proper divisors (15803145237).

20212221121003 is a wasteful number, since it uses less digits than its factorization.

20212221121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15803145236.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20212221121003 its reverse (30012112221202), we get a palindrome (50224333342205).

The spelling of 20212221121003 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, three".