20221212212103 has 24 divisors (see below), whose sum is σ = 31419220785408. Its totient is φ = 11534454419376.

The previous prime is 20221212212099. The next prime is 20221212212119. The reversal of 20221212212103 is 30121221212202.

It is not a de Polignac number, because 20221212212103 - 2² = 20221212212099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20221212212103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221212212153) 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, 122083551 + ... + 122249072.

It is an arithmetic number, because the mean of its divisors is an integer number (1309134199392).

Almost surely, 2^{20221212212103} is an apocalyptic number.

20221212212103 is a deficient number, since it is larger than the sum of its proper divisors (11198008573305).

20221212212103 is a wasteful number, since it uses less digits than its factorization.

20221212212103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244333203 (or 244333196 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20221212212103 its reverse (30121221212202), we get a palindrome (50342433424305).

Subtracting 20221212212103 from its reverse (30121221212202), we obtain a palindrome (9900009000099).

The spelling of 20221212212103 in words is "twenty trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, one hundred three".