1221002200139 has 2 divisors, whose sum is σ = 1221002200140. Its totient is φ = 1221002200138.

The previous prime is 1221002200087. The next prime is 1221002200141. The reversal of 1221002200139 is 9310022001221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221002200139 is a prime.

It is a super-2 number, since 2×1221002200139² (a number of 25 digits) contains 22 as substring.

Together with 1221002200141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1221002200339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610501100069 + 610501100070.

It is an arithmetic number, because the mean of its divisors is an integer number (610501100070).

Almost surely, 2^{1221002200139} is an apocalyptic number.

1221002200139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221002200139 is an equidigital number, since it uses as much as digits as its factorization.

1221002200139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 1221002200139 in words is "one trillion, two hundred twenty-one billion, two million, two hundred thousand, one hundred thirty-nine".