2212012210021 has 2 divisors, whose sum is σ = 2212012210022. Its totient is φ = 2212012210020.

The previous prime is 2212012209991. The next prime is 2212012210039. The reversal of 2212012210021 is 1200122102122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1936859507521 + 275152702500 = 1391711^2 + 524550^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212012210021 - 2⁵ = 2212012209989 is a prime.

It is a super-2 number, since 2×2212012210021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2212012209977 and 2212012210004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2212012210061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106006105010 + 1106006105011.

It is an arithmetic number, because the mean of its divisors is an integer number (1106006105011).

Almost surely, 2^{2212012210021} is an apocalyptic number.

It is an amenable number.

2212012210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212012210021 is an equidigital number, since it uses as much as digits as its factorization.

2212012210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2212012210021 its reverse (1200122102122), we get a palindrome (3412134312143).

The spelling of 2212012210021 in words is "two trillion, two hundred twelve billion, twelve million, two hundred ten thousand, twenty-one".