21233111331373 has 2 divisors, whose sum is σ = 21233111331374. Its totient is φ = 21233111331372.

The previous prime is 21233111331329. The next prime is 21233111331407. The reversal of 21233111331373 is 37313311133212.

It is an a-pointer prime, because the next prime (21233111331407) can be obtained adding 21233111331373 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18535590868804 + 2697520462569 = 4305298^2 + 1642413^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233111331373 - 2¹³ = 21233111323181 is a prime.

It is a super-2 number, since 2×21233111331373² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233111931373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616555665686 + 10616555665687.

It is an arithmetic number, because the mean of its divisors is an integer number (10616555665687).

Almost surely, 2^{21233111331373} is an apocalyptic number.

It is an amenable number.

21233111331373 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233111331373 is an equidigital number, since it uses as much as digits as its factorization.

21233111331373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 34.

Adding to 21233111331373 its reverse (37313311133212), we get a palindrome (58546422464585).

The spelling of 21233111331373 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred eleven million, three hundred thirty-one thousand, three hundred seventy-three".