20012221012203 has 24 divisors (see below), whose sum is σ = 33180309624800. Its totient is φ = 11385617935104.

The previous prime is 20012221012177. The next prime is 20012221012211. The reversal of 20012221012203 is 30221012221002.

It is not a de Polignac number, because 20012221012203 - 2⁵ = 20012221012171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012221012243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 693553918 + ... + 693582771.

Almost surely, 2^{20012221012203} is an apocalyptic number.

20012221012203 is a deficient number, since it is larger than the sum of its proper divisors (13168088612597).

20012221012203 is a wasteful number, since it uses less digits than its factorization.

20012221012203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387136931 (or 1387136928 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20012221012203 its reverse (30221012221002), we get a palindrome (50233233233205).

The spelling of 20012221012203 in words is "twenty trillion, twelve billion, two hundred twenty-one million, twelve thousand, two hundred three".