20211212113203 has 16 divisors (see below), whose sum is σ = 26976361698720. Its totient is φ = 13460107431936.

The previous prime is 20211212113201. The next prime is 20211212113237. The reversal of 20211212113203 is 30231121211202.

It is not a de Polignac number, because 20211212113203 - 2¹ = 20211212113201 is a prime.

It is a super-3 number, since 3×20211212113203³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20211212113203.

It is not an unprimeable number, because it can be changed into a prime (20211212113201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14172403 + ... + 15533171.

It is an arithmetic number, because the mean of its divisors is an integer number (1686022606170).

Almost surely, 2^{20211212113203} is an apocalyptic number.

20211212113203 is a deficient number, since it is larger than the sum of its proper divisors (6765149585517).

20211212113203 is a wasteful number, since it uses less digits than its factorization.

20211212113203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365926.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20211212113203 its reverse (30231121211202), we get a palindrome (50442333324405).

The spelling of 20211212113203 in words is "twenty trillion, two hundred eleven billion, two hundred twelve million, one hundred thirteen thousand, two hundred three".