21431201222033 has 4 divisors (see below), whose sum is σ = 21702482250240. Its totient is φ = 21159920193828.

The previous prime is 21431201222027. The next prime is 21431201222099. The reversal of 21431201222033 is 33022210213412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21431201222033 - 2⁸ = 21431201221777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21431201221993 and 21431201222011.

It is not an unprimeable number, because it can be changed into a prime (21431201222833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135640513985 + ... + 135640514142.

It is an arithmetic number, because the mean of its divisors is an integer number (5425620562560).

Almost surely, 2^{21431201222033} is an apocalyptic number.

It is an amenable number.

21431201222033 is a deficient number, since it is larger than the sum of its proper divisors (271281028207).

21431201222033 is an equidigital number, since it uses as much as digits as its factorization.

21431201222033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271281028206.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21431201222033 its reverse (33022210213412), we get a palindrome (54453411435445).

The spelling of 21431201222033 in words is "twenty-one trillion, four hundred thirty-one billion, two hundred one million, two hundred twenty-two thousand, thirty-three".