1223011322220 has 96 divisors (see below), whose sum is σ = 3518220561408. Its totient is φ = 317210280192.

The previous prime is 1223011322179. The next prime is 1223011322231. The reversal of 1223011322220 is 222231103221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6313729 + ... + 6504551.

It is an arithmetic number, because the mean of its divisors is an integer number (36648130848).

Almost surely, 2^{1223011322220} is an apocalyptic number.

1223011322220 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 1223011322220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1759110280704).

1223011322220 is an abundant number, since it is smaller than the sum of its proper divisors (2295209239188).

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

1223011322220 is a wasteful number, since it uses less digits than its factorization.

1223011322220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193759 (or 193757 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1223011322220 its reverse (222231103221), we get a palindrome (1445242425441).

The spelling of 1223011322220 in words is "one trillion, two hundred twenty-three billion, eleven million, three hundred twenty-two thousand, two hundred twenty".