1206436346021 has 2 divisors, whose sum is σ = 1206436346022. Its totient is φ = 1206436346020.

The previous prime is 1206436345997. The next prime is 1206436346039.

1206436346021 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189657029796 + 16779316225 = 1090714^2 + 129535^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1206436346021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1206436346041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603218173010 + 603218173011.

It is an arithmetic number, because the mean of its divisors is an integer number (603218173011).

Almost surely, 2^{1206436346021} is an apocalyptic number.

It is an amenable number.

1206436346021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206436346021 is an equidigital number, since it uses as much as digits as its factorization.

1206436346021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 1206436346021 in words is "one trillion, two hundred six billion, four hundred thirty-six million, three hundred forty-six thousand, twenty-one".