21000222311 has 2 divisors, whose sum is σ = 21000222312. Its totient is φ = 21000222310.

The previous prime is 21000222253. The next prime is 21000222343. The reversal of 21000222311 is 11322200012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000222311 - 2³⁴ = 3820353127 is a prime.

It is a super-2 number, since 2×21000222311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000222361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500111155 + 10500111156.

It is an arithmetic number, because the mean of its divisors is an integer number (10500111156).

Almost surely, 2^21000222311 is an apocalyptic number.

21000222311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000222311 is an equidigital number, since it uses as much as digits as its factorization.

21000222311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21000222311 its reverse (11322200012), we get a palindrome (32322422323).

The spelling of 21000222311 in words is "twenty-one billion, two hundred twenty-two thousand, three hundred eleven".