122122521440 has 96 divisors (see below), whose sum is σ = 298204623360. Its totient is φ = 47233406464.

The previous prime is 122122521421. The next prime is 122122521463. The reversal of 122122521440 is 44125221221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526331 + ... + 721989.

It is an arithmetic number, because the mean of its divisors is an integer number (3106298160).

Almost surely, 2^122122521440 is an apocalyptic number.

122122521440 is a gapful number since it is divisible by the number (10) 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 122122521440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149102311680).

122122521440 is an abundant number, since it is smaller than the sum of its proper divisors (176082101920).

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

122122521440 is a wasteful number, since it uses less digits than its factorization.

122122521440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195804 (or 195796 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 122122521440 its reverse (44125221221), we get a palindrome (166247742661).

The spelling of 122122521440 in words is "one hundred twenty-two billion, one hundred twenty-two million, five hundred twenty-one thousand, four hundred forty".