1222312111020 has 1728 divisors, whose sum is σ = 5286720531456. Its totient is φ = 220569661440.

The previous prime is 1222312111003. The next prime is 1222312111051. The reversal of 1222312111020 is 201112132221.

1222312111020 is a `hidden beast` number, since 1 + 222 + 312 + 1 + 110 + 20 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1222312110984 and 1222312111002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 14726651899 + ... + 14726651981.

It is an arithmetic number, because the mean of its divisors is an integer number (3059444752).

Almost surely, 2^{1222312111020} is an apocalyptic number.

1222312111020 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 1222312111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2643360265728).

1222312111020 is an abundant number, since it is smaller than the sum of its proper divisors (4064408420436).

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

1222312111020 is a wasteful number, since it uses less digits than its factorization.

1222312111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1222312111020 its reverse (201112132221), we get a palindrome (1423424243241).

The spelling of 1222312111020 in words is "one trillion, two hundred twenty-two billion, three hundred twelve million, one hundred eleven thousand, twenty".