1220222132220 has 288 divisors, whose sum is σ = 4310169905664. Its totient is φ = 251172218880.

The previous prime is 1220222132191. The next prime is 1220222132287. The reversal of 1220222132220 is 222312220221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9111787 + ... + 9244733.

It is an arithmetic number, because the mean of its divisors is an integer number (14965867728).

Almost surely, 2^{1220222132220} is an apocalyptic number.

1220222132220 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 1220222132220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2155084952832).

1220222132220 is an abundant number, since it is smaller than the sum of its proper divisors (3089947773444).

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

1220222132220 is a wasteful number, since it uses less digits than its factorization.

1220222132220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133061 (or 133018 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 1220222132220 its reverse (222312220221), we get a palindrome (1442534352441).

The spelling of 1220222132220 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred thirty-two thousand, two hundred twenty".