21201112011311 has 2 divisors, whose sum is σ = 21201112011312. Its totient is φ = 21201112011310.

The previous prime is 21201112011307. The next prime is 21201112011329. The reversal of 21201112011311 is 11311021110212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201112011311 - 2² = 21201112011307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21201112011311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201112010311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600556005655 + 10600556005656.

It is an arithmetic number, because the mean of its divisors is an integer number (10600556005656).

Almost surely, 2^{21201112011311} is an apocalyptic number.

21201112011311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201112011311 is an equidigital number, since it uses as much as digits as its factorization.

21201112011311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 21201112011311 its reverse (11311021110212), we get a palindrome (32512133121523).

The spelling of 21201112011311 in words is "twenty-one trillion, two hundred one billion, one hundred twelve million, eleven thousand, three hundred eleven".