1221112079039 has 2 divisors, whose sum is σ = 1221112079040. Its totient is φ = 1221112079038.

The previous prime is 1221112079021. The next prime is 1221112079087. The reversal of 1221112079039 is 9309702111221.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9309702111221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221112079039 - 2²⁸ = 1220843643583 is a prime.

It is a super-2 number, since 2×1221112079039² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221112078993 and 1221112079011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221112079339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610556039519 + 610556039520.

It is an arithmetic number, because the mean of its divisors is an integer number (610556039520).

Almost surely, 2^{1221112079039} is an apocalyptic number.

1221112079039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221112079039 is an equidigital number, since it uses as much as digits as its factorization.

1221112079039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The spelling of 1221112079039 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, seventy-nine thousand, thirty-nine".