21030221212303 has 16 divisors (see below), whose sum is σ = 21278993682240. Its totient is φ = 20782252512000.

The previous prime is 21030221212271. The next prime is 21030221212309. The reversal of 21030221212303 is 30321212203012.

It is a cyclic number.

It is not a de Polignac number, because 21030221212303 - 2⁵ = 21030221212271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030221212309) 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, 697065403 + ... + 697095571.

It is an arithmetic number, because the mean of its divisors is an integer number (1329937105140).

Almost surely, 2^{21030221212303} is an apocalyptic number.

21030221212303 is a deficient number, since it is larger than the sum of its proper divisors (248772469937).

21030221212303 is a wasteful number, since it uses less digits than its factorization.

21030221212303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43218.

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

Adding to 21030221212303 its reverse (30321212203012), we get a palindrome (51351433415315).

The spelling of 21030221212303 in words is "twenty-one trillion, thirty billion, two hundred twenty-one million, two hundred twelve thousand, three hundred three".