1222401320 has 128 divisors (see below), whose sum is σ = 3376028160. Its totient is φ = 388792320.

The previous prime is 1222401317. The next prime is 1222401373. The reversal of 1222401320 is 231042221.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336152 + ... + 339768.

It is an arithmetic number, because the mean of its divisors is an integer number (26375220).

Almost surely, 2^1222401320 is an apocalyptic number.

1222401320 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 1222401320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1688014080).

1222401320 is an abundant number, since it is smaller than the sum of its proper divisors (2153626840).

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

1222401320 is a wasteful number, since it uses less digits than its factorization.

1222401320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1222401320 is about 34962.8562906408. The cubic root of 1222401320 is about 1069.2303312907.

Adding to 1222401320 its reverse (231042221), we get a palindrome (1453443541).

The spelling of 1222401320 in words is "one billion, two hundred twenty-two million, four hundred one thousand, three hundred twenty".