21310403311 has 2 divisors, whose sum is σ = 21310403312. Its totient is φ = 21310403310.

The previous prime is 21310403243. The next prime is 21310403333. The reversal of 21310403311 is 11330401312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21310403311 - 2³¹ = 19162919663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21310403341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655201655 + 10655201656.

It is an arithmetic number, because the mean of its divisors is an integer number (10655201656).

Almost surely, 2^21310403311 is an apocalyptic number.

21310403311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310403311 is an equidigital number, since it uses as much as digits as its factorization.

21310403311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21310403311 its reverse (11330401312), we get a palindrome (32640804623).

The spelling of 21310403311 in words is "twenty-one billion, three hundred ten million, four hundred three thousand, three hundred eleven".