1221120022139 has 2 divisors, whose sum is σ = 1221120022140. Its totient is φ = 1221120022138.

The previous prime is 1221120022103. The next prime is 1221120022261. The reversal of 1221120022139 is 9312200211221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221120022139 - 2³² = 1216825054843 is a prime.

It is a super-2 number, since 2×1221120022139² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1221120022439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610560011069 + 610560011070.

It is an arithmetic number, because the mean of its divisors is an integer number (610560011070).

Almost surely, 2^{1221120022139} is an apocalyptic number.

1221120022139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221120022139 is an equidigital number, since it uses as much as digits as its factorization.

1221120022139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 1221120022139 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, twenty-two thousand, one hundred thirty-nine".