122791812 has 96 divisors (see below), whose sum is σ = 339440640. Its totient is φ = 34058880.

The previous prime is 122791793. The next prime is 122791847. The reversal of 122791812 is 218197221.

122791812 is nontrivially palindromic in base 5.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279489 + ... + 279927.

It is an arithmetic number, because the mean of its divisors is an integer number (3535840).

Almost surely, 2^122791812 is an apocalyptic number.

122791812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122791812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169720320).

122791812 is an abundant number, since it is smaller than the sum of its proper divisors (216648828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122791812 is a wasteful number, since it uses less digits than its factorization.

122791812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 631 counting only the distinct ones).

The product of its digits is 4032, while the sum is 33.

The square root of 122791812 is about 11081.1466915658. The cubic root of 122791812 is about 497.0382399287.

It can be divided in two parts, 1227 and 91812, that added together give a palindrome (93039).

The spelling of 122791812 in words is "one hundred twenty-two million, seven hundred ninety-one thousand, eight hundred twelve".