21020212313311 has 2 divisors, whose sum is σ = 21020212313312. Its totient is φ = 21020212313310.

The previous prime is 21020212313257. The next prime is 21020212313327. The reversal of 21020212313311 is 11331321202012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020212313311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020212313011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510106156655 + 10510106156656.

It is an arithmetic number, because the mean of its divisors is an integer number (10510106156656).

Almost surely, 2^{21020212313311} is an apocalyptic number.

21020212313311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020212313311 is an equidigital number, since it uses as much as digits as its factorization.

21020212313311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21020212313311 its reverse (11331321202012), we get a palindrome (32351533515323).

The spelling of 21020212313311 in words is "twenty-one trillion, twenty billion, two hundred twelve million, three hundred thirteen thousand, three hundred eleven".