1211220222300 has 216 divisors, whose sum is σ = 4142509862400. Its totient is φ = 293567414400.

The previous prime is 1211220222299. The next prime is 1211220222313. The reversal of 1211220222300 is 32220221121.

1211220222300 is a `hidden beast` number, since 1 + 21 + 122 + 0 + 222 + 300 = 666.

It is a super-2 number, since 2×1211220222300² (a number of 25 digits) contains 22 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 62350389 + ... + 62369811.

It is an arithmetic number, because the mean of its divisors is an integer number (19178286400).

Almost surely, 2^{1211220222300} is an apocalyptic number.

1211220222300 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 1211220222300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2071254931200).

1211220222300 is an abundant number, since it is smaller than the sum of its proper divisors (2931289640100).

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

1211220222300 is a wasteful number, since it uses less digits than its factorization.

1211220222300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25753 (or 25743 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1211220222300 its reverse (32220221121), we get a palindrome (1243440443421).

The spelling of 1211220222300 in words is "one trillion, two hundred eleven billion, two hundred twenty million, two hundred twenty-two thousand, three hundred".