21211232031203 has 8 divisors (see below), whose sum is σ = 21230773032480. Its totient is φ = 21191695943040.

The previous prime is 21211232031181. The next prime is 21211232031217. The reversal of 21211232031203 is 30213023211212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211232031203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211232031293) 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, 7438373 + ... + 9886953.

It is an arithmetic number, because the mean of its divisors is an integer number (2653846629060).

Almost surely, 2^{21211232031203} is an apocalyptic number.

21211232031203 is a deficient number, since it is larger than the sum of its proper divisors (19541001277).

21211232031203 is a wasteful number, since it uses less digits than its factorization.

21211232031203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456557.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21211232031203 its reverse (30213023211212), we get a palindrome (51424255242415).

The spelling of 21211232031203 in words is "twenty-one trillion, two hundred eleven billion, two hundred thirty-two million, thirty-one thousand, two hundred three".