21311233412133 has 32 divisors (see below), whose sum is σ = 33424923890944. Its totient is φ = 11822789279232.

The previous prime is 21311233412129. The next prime is 21311233412197. The reversal of 21311233412133 is 33121433211312.

It is not a de Polignac number, because 21311233412133 - 2² = 21311233412129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21311233412133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311233412113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29653210 + ... + 30363387.

It is an arithmetic number, because the mean of its divisors is an integer number (1044528871592).

Almost surely, 2^{21311233412133} is an apocalyptic number.

It is an amenable number.

21311233412133 is a deficient number, since it is larger than the sum of its proper divisors (12113690478811).

21311233412133 is a wasteful number, since it uses less digits than its factorization.

21311233412133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60017101.

The product of its digits is 7776, while the sum is 30.

Adding to 21311233412133 its reverse (33121433211312), we get a palindrome (54432666623445).

The spelling of 21311233412133 in words is "twenty-one trillion, three hundred eleven billion, two hundred thirty-three million, four hundred twelve thousand, one hundred thirty-three".