21220321201233 has 48 divisors (see below), whose sum is σ = 36493866832320. Its totient is φ = 10842829603200.

The previous prime is 21220321201231. The next prime is 21220321201243. The reversal of 21220321201233 is 33210212302212.

It is not a de Polignac number, because 21220321201233 - 2¹ = 21220321201231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220321201231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107469118 + ... + 107666391.

It is an arithmetic number, because the mean of its divisors is an integer number (760288892340).

Almost surely, 2^{21220321201233} is an apocalyptic number.

It is an amenable number.

21220321201233 is a deficient number, since it is larger than the sum of its proper divisors (15273545631087).

21220321201233 is a wasteful number, since it uses less digits than its factorization.

21220321201233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215135598 (or 215135591 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21220321201233 its reverse (33210212302212), we get a palindrome (54430533503445).

The spelling of 21220321201233 in words is "twenty-one trillion, two hundred twenty billion, three hundred twenty-one million, two hundred one thousand, two hundred thirty-three".