1220222211210 has 128 divisors (see below), whose sum is σ = 3446713866240. Its totient is φ = 306129134592.

The previous prime is 1220222211209. The next prime is 1220222211251. The reversal of 1220222211210 is 121122220221.

It is a happy number.

1220222211210 is a `hidden beast` number, since 1 + 2 + 20 + 222 + 211 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11684647 + ... + 11788613.

It is an arithmetic number, because the mean of its divisors is an integer number (26927452080).

Almost surely, 2^{1220222211210} is an apocalyptic number.

1220222211210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220222211210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723356933120).

1220222211210 is an abundant number, since it is smaller than the sum of its proper divisors (2226491655030).

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

1220222211210 is a wasteful number, since it uses less digits than its factorization.

1220222211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106557 (or 106551 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1220222211210 its reverse (121122220221), we get a palindrome (1341344431431).

The spelling of 1220222211210 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred eleven thousand, two hundred ten".