121622834921389 has 2 divisors, whose sum is σ = 121622834921390. Its totient is φ = 121622834921388.

The previous prime is 121622834921383. The next prime is 121622834921479. The reversal of 121622834921389 is 983129438226121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99318325676164 + 22304509245225 = 9965858^2 + 4722765^2 .

It is a cyclic number.

It is not a de Polignac number, because 121622834921389 - 2¹³ = 121622834913197 is a prime.

It is a super-2 number, since 2×121622834921389² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121622834921383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60811417460694 + 60811417460695.

It is an arithmetic number, because the mean of its divisors is an integer number (60811417460695).

Almost surely, 2^{121622834921389} is an apocalyptic number.

It is an amenable number.

121622834921389 is a deficient number, since it is larger than the sum of its proper divisors (1).

121622834921389 is an equidigital number, since it uses as much as digits as its factorization.

121622834921389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17915904, while the sum is 61.

The spelling of 121622834921389 in words is "one hundred twenty-one trillion, six hundred twenty-two billion, eight hundred thirty-four million, nine hundred twenty-one thousand, three hundred eighty-nine".