21221341263233 has 8 divisors (see below), whose sum is σ = 21235595865000. Its totient is φ = 21207091419648.

The previous prime is 21221341263217. The next prime is 21221341263251. The reversal of 21221341263233 is 33236214312212.

It can be written as a sum of positive squares in 4 ways, for example, as 5035661664784 + 16185679598449 = 2244028^2 + 4023143^2 .

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 21221341263233 - 2⁴ = 21221341263217 is a prime.

It is a super-2 number, since 2×21221341263233² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21221341263193 and 21221341263202.

It is not an unprimeable number, because it can be changed into a prime (21221341263253) 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, 7755953 + ... + 10129041.

It is an arithmetic number, because the mean of its divisors is an integer number (2654449483125).

Almost surely, 2^{21221341263233} is an apocalyptic number.

It is an amenable number.

21221341263233 is a deficient number, since it is larger than the sum of its proper divisors (14254601767).

21221341263233 is a wasteful number, since it uses less digits than its factorization.

21221341263233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379091.

The product of its digits is 62208, while the sum is 35.

Adding to 21221341263233 its reverse (33236214312212), we get a palindrome (54457555575445).

The spelling of 21221341263233 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred forty-one million, two hundred sixty-three thousand, two hundred thirty-three".