21122200223 has 2 divisors, whose sum is σ = 21122200224. Its totient is φ = 21122200222.

The previous prime is 21122200219. The next prime is 21122200261. The reversal of 21122200223 is 32200222112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21122200223 - 2² = 21122200219 is a prime.

It is a super-2 number, since 2×21122200223² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122290223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561100111 + 10561100112.

It is an arithmetic number, because the mean of its divisors is an integer number (10561100112).

Almost surely, 2^21122200223 is an apocalyptic number.

21122200223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122200223 is an equidigital number, since it uses as much as digits as its factorization.

21122200223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21122200223 its reverse (32200222112), we get a palindrome (53322422335).

The spelling of 21122200223 in words is "twenty-one billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-three".