21421122311 has 2 divisors, whose sum is σ = 21421122312. Its totient is φ = 21421122310.

The previous prime is 21421122301. The next prime is 21421122403. The reversal of 21421122311 is 11322112412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21421122311 - 2¹⁰ = 21421121287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21421122301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10710561155 + 10710561156.

It is an arithmetic number, because the mean of its divisors is an integer number (10710561156).

Almost surely, 2^21421122311 is an apocalyptic number.

21421122311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21421122311 is an equidigital number, since it uses as much as digits as its factorization.

21421122311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 20.

Adding to 21421122311 its reverse (11322112412), we get a palindrome (32743234723).

The spelling of 21421122311 in words is "twenty-one billion, four hundred twenty-one million, one hundred twenty-two thousand, three hundred eleven".