122247222591 has 12 divisors (see below), whose sum is σ = 175537608792. Its totient is φ = 75227716368.

The previous prime is 122247222571. The next prime is 122247222607. The reversal of 122247222591 is 195222742221.

It is not a de Polignac number, because 122247222591 - 2⁶ = 122247222527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122247222511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2155500 + ... + 2211486.

It is an arithmetic number, because the mean of its divisors is an integer number (14628134066).

Almost surely, 2^122247222591 is an apocalyptic number.

122247222591 is a deficient number, since it is larger than the sum of its proper divisors (53290386201).

122247222591 is an frugal number, since it uses more digits than its factorization.

122247222591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111990 (or 56003 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

Multiplying 122247222591 by its sum of digits (39), we get a square (4767641681049 = 2183493²).

122247222591 divided by its sum of digits (39) gives a square (3134544169 = 55987²).

The spelling of 122247222591 in words is "one hundred twenty-two billion, two hundred forty-seven million, two hundred twenty-two thousand, five hundred ninety-one".