122547420691 has 2 divisors, whose sum is σ = 122547420692. Its totient is φ = 122547420690.

The previous prime is 122547420673. The next prime is 122547420701. The reversal of 122547420691 is 196024745221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122547420691 - 2¹³ = 122547412499 is a prime.

It is not a weakly prime, because it can be changed into another prime (122547420091) 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, 61273710345 + 61273710346.

It is an arithmetic number, because the mean of its divisors is an integer number (61273710346).

Almost surely, 2^122547420691 is an apocalyptic number.

122547420691 is a deficient number, since it is larger than the sum of its proper divisors (1).

122547420691 is an equidigital number, since it uses as much as digits as its factorization.

122547420691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 122547420691 in words is "one hundred twenty-two billion, five hundred forty-seven million, four hundred twenty thousand, six hundred ninety-one".