1222012000021 has 2 divisors, whose sum is σ = 1222012000022. Its totient is φ = 1222012000020.

The previous prime is 1222011999997. The next prime is 1222012000051. The reversal of 1222012000021 is 1200002102221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1102720511025 + 119291488996 = 1050105^2 + 345386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222012000021 - 2¹⁹ = 1222011475733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222011999965 and 1222012000010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222012000051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611006000010 + 611006000011.

It is an arithmetic number, because the mean of its divisors is an integer number (611006000011).

Almost surely, 2^{1222012000021} is an apocalyptic number.

It is an amenable number.

1222012000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222012000021 is an equidigital number, since it uses as much as digits as its factorization.

1222012000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1222012000021 its reverse (1200002102221), we get a palindrome (2422014102242).

The spelling of 1222012000021 in words is "one trillion, two hundred twenty-two billion, twelve million, twenty-one", and thus it is an aban number.