1221213334039 has 2 divisors, whose sum is σ = 1221213334040. Its totient is φ = 1221213334038.

The previous prime is 1221213334001. The next prime is 1221213334043. The reversal of 1221213334039 is 9304333121221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221213334039 - 2³¹ = 1219065850391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221213333995 and 1221213334013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221213338039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610606667019 + 610606667020.

It is an arithmetic number, because the mean of its divisors is an integer number (610606667020).

Almost surely, 2^{1221213334039} is an apocalyptic number.

1221213334039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221213334039 is an equidigital number, since it uses as much as digits as its factorization.

1221213334039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 1221213334039 in words is "one trillion, two hundred twenty-one billion, two hundred thirteen million, three hundred thirty-four thousand, thirty-nine".