21121101233311 has 2 divisors, whose sum is σ = 21121101233312. Its totient is φ = 21121101233310.

The previous prime is 21121101233293. The next prime is 21121101233327. The reversal of 21121101233311 is 11333210112112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21121101233311 is a prime.

It is a super-2 number, since 2×21121101233311² (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 (21121101233341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560550616655 + 10560550616656.

It is an arithmetic number, because the mean of its divisors is an integer number (10560550616656).

Almost surely, 2^{21121101233311} is an apocalyptic number.

21121101233311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121101233311 is an equidigital number, since it uses as much as digits as its factorization.

21121101233311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21121101233311 its reverse (11333210112112), we get a palindrome (32454311345423).

The spelling of 21121101233311 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred one million, two hundred thirty-three thousand, three hundred eleven".