21212201231203 has 8 divisors (see below), whose sum is σ = 21225267494480. Its totient is φ = 21199138028640.

The previous prime is 21212201231189. The next prime is 21212201231267. The reversal of 21212201231203 is 30213210221212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21212201231203 - 2³⁷ = 21074762277731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212201231603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13178173 + ... + 14699953.

It is an arithmetic number, because the mean of its divisors is an integer number (2653158436810).

Almost surely, 2^{21212201231203} is an apocalyptic number.

21212201231203 is a deficient number, since it is larger than the sum of its proper divisors (13066263277).

21212201231203 is a wasteful number, since it uses less digits than its factorization.

21212201231203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530357.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21212201231203 its reverse (30213210221212), we get a palindrome (51425411452415).

The spelling of 21212201231203 in words is "twenty-one trillion, two hundred twelve billion, two hundred one million, two hundred thirty-one thousand, two hundred three".