21021233120203 has 8 divisors (see below), whose sum is σ = 22135375219520. Its totient is φ = 19907867161800.

The previous prime is 21021233120161. The next prime is 21021233120213. The reversal of 21021233120203 is 30202133212012.

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

It is a de Polignac number, because none of the positive numbers 2^k-21021233120203 is a prime.

It is a super-2 number, since 2×21021233120203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021233120213) 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, 193979625 + ... + 194087962.

It is an arithmetic number, because the mean of its divisors is an integer number (2766921902440).

Almost surely, 2^{21021233120203} is an apocalyptic number.

21021233120203 is a deficient number, since it is larger than the sum of its proper divisors (1114142099317).

21021233120203 is a wasteful number, since it uses less digits than its factorization.

21021233120203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388070457.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21021233120203 its reverse (30202133212012), we get a palindrome (51223366332215).

The spelling of 21021233120203 in words is "twenty-one trillion, twenty-one billion, two hundred thirty-three million, one hundred twenty thousand, two hundred three".