122021609472 has 324 divisors, whose sum is σ = 410251697856. Its totient is φ = 34846801920.

The previous prime is 122021609429. The next prime is 122021609513. The reversal of 122021609472 is 274906120221.

122021609472 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 2 + 1 + 609 + 47 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 57801697 + ... + 57803807.

It is an arithmetic number, because the mean of its divisors is an integer number (1266208944).

Almost surely, 2^122021609472 is an apocalyptic number.

122021609472 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 122021609472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205125848928).

122021609472 is an abundant number, since it is smaller than the sum of its proper divisors (288230088384).

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

122021609472 is an frugal number, since it uses more digits than its factorization.

122021609472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Adding to 122021609472 its reverse (274906120221), we get a palindrome (396927729693).

The spelling of 122021609472 in words is "one hundred twenty-two billion, twenty-one million, six hundred nine thousand, four hundred seventy-two".