21220112212203 has 32 divisors (see below), whose sum is σ = 28441558056960. Its totient is φ = 14072879826720.

The previous prime is 21220112212177. The next prime is 21220112212207. The reversal of 21220112212203 is 30221221102212.

It is not a de Polignac number, because 21220112212203 - 2²⁶ = 21220045103339 is a prime.

It is a super-2 number, since 2×21220112212203² (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 21220112212203.

It is not an unprimeable number, because it can be changed into a prime (21220112212207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1985595126 + ... + 1985605812.

It is an arithmetic number, because the mean of its divisors is an integer number (888798689280).

Almost surely, 2^{21220112212203} is an apocalyptic number.

21220112212203 is a deficient number, since it is larger than the sum of its proper divisors (7221445844757).

21220112212203 is a wasteful number, since it uses less digits than its factorization.

21220112212203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14487.

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

Adding to 21220112212203 its reverse (30221221102212), we get a palindrome (51441333314415).

The spelling of 21220112212203 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, two hundred twelve thousand, two hundred three".