1201222222110 has 128 divisors (see below), whose sum is σ = 3228543360000. Its totient is φ = 317800734336.

The previous prime is 1201222222099. The next prime is 1201222222117. The reversal of 1201222222110 is 112222221021.

It is a happy number.

It is a super-3 number, since 3×1201222222110³ (a number of 37 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201222222117) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58123639 + ... + 58144301.

It is an arithmetic number, because the mean of its divisors is an integer number (25222995000).

Almost surely, 2^{1201222222110} is an apocalyptic number.

1201222222110 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 1201222222110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614271680000).

1201222222110 is an abundant number, since it is smaller than the sum of its proper divisors (2027321137890).

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

1201222222110 is a wasteful number, since it uses less digits than its factorization.

1201222222110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22367 (or 22361 counting only the distinct ones).

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

Adding to 1201222222110 its reverse (112222221021), we get a palindrome (1313444443131).

The spelling of 1201222222110 in words is "one trillion, two hundred one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred ten".