21112302311 has 2 divisors, whose sum is σ = 21112302312. Its totient is φ = 21112302310.

The previous prime is 21112302293. The next prime is 21112302319. The reversal of 21112302311 is 11320321112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112302311 - 2¹⁸ = 21112040167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21112302311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112302319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556151155 + 10556151156.

It is an arithmetic number, because the mean of its divisors is an integer number (10556151156).

Almost surely, 2^21112302311 is an apocalyptic number.

21112302311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112302311 is an equidigital number, since it uses as much as digits as its factorization.

21112302311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21112302311 its reverse (11320321112), we get a palindrome (32432623423).

The spelling of 21112302311 in words is "twenty-one billion, one hundred twelve million, three hundred two thousand, three hundred eleven".