1223031022220 has 144 divisors (see below), whose sum is σ = 3097670833152. Its totient is φ = 404008375680.

The previous prime is 1223031022211. The next prime is 1223031022231. The reversal of 1223031022220 is 222201303221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1223031022192 and 1223031022201.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6807587 + ... + 6984933.

It is an arithmetic number, because the mean of its divisors is an integer number (21511603008).

Almost surely, 2^{1223031022220} is an apocalyptic number.

1223031022220 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 1223031022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548835416576).

1223031022220 is an abundant number, since it is smaller than the sum of its proper divisors (1874639810932).

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

1223031022220 is a wasteful number, since it uses less digits than its factorization.

1223031022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177628 (or 177619 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1223031022220 its reverse (222201303221), we get a palindrome (1445232325441).

The spelling of 1223031022220 in words is "one trillion, two hundred twenty-three billion, thirty-one million, twenty-two thousand, two hundred twenty".