1220170237220 has 96 divisors (see below), whose sum is σ = 2826269905536. Its totient is φ = 438805452800.

The previous prime is 1220170237193. The next prime is 1220170237259. The reversal of 1220170237220 is 227320710221.

It is a happy number.

It is a super-2 number, since 2×1220170237220² (a number of 25 digits) contains 22 as substring.

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, 8372012 + ... + 8516508.

It is an arithmetic number, because the mean of its divisors is an integer number (29440311516).

Almost surely, 2^{1220170237220} is an apocalyptic number.

1220170237220 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 1220170237220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1413134952768).

1220170237220 is an abundant number, since it is smaller than the sum of its proper divisors (1606099668316).

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

1220170237220 is a wasteful number, since it uses less digits than its factorization.

1220170237220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144941 (or 144939 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

Adding to 1220170237220 its reverse (227320710221), we get a palindrome (1447490947441).

The spelling of 1220170237220 in words is "one trillion, two hundred twenty billion, one hundred seventy million, two hundred thirty-seven thousand, two hundred twenty".