122221521403320 has 128 divisors (see below), whose sum is σ = 371886464701440. Its totient is φ = 32128379028480.

The previous prime is 122221521403307. The next prime is 122221521403321. The reversal of 122221521403320 is 23304125122221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221521403321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54041877 + ... + 56258043.

It is an arithmetic number, because the mean of its divisors is an integer number (2905363005480).

Almost surely, 2^{122221521403320} is an apocalyptic number.

122221521403320 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 122221521403320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185943232350720).

122221521403320 is an abundant number, since it is smaller than the sum of its proper divisors (249664943298120).

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

122221521403320 is a wasteful number, since it uses less digits than its factorization.

122221521403320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222725 (or 2222721 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 122221521403320 its reverse (23304125122221), we get a palindrome (145525646525541).

The spelling of 122221521403320 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, five hundred twenty-one million, four hundred three thousand, three hundred twenty".