21222100023031 has 2 divisors, whose sum is σ = 21222100023032. Its totient is φ = 21222100023030.

The previous prime is 21222100022999. The next prime is 21222100023071. The reversal of 21222100023031 is 13032000122212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222100023031 - 2⁵ = 21222100022999 is a prime.

It is a super-2 number, since 2×21222100023031² (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 (21222100023071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611050011515 + 10611050011516.

It is an arithmetic number, because the mean of its divisors is an integer number (10611050011516).

Almost surely, 2^{21222100023031} is an apocalyptic number.

21222100023031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222100023031 is an equidigital number, since it uses as much as digits as its factorization.

21222100023031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21222100023031 its reverse (13032000122212), we get a palindrome (34254100145243).

The spelling of 21222100023031 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred million, twenty-three thousand, thirty-one".