1222021000116 has 108 divisors (see below), whose sum is σ = 3593619059940. Its totient is φ = 349120154880.

The previous prime is 1222021000009. The next prime is 1222021000121. The reversal of 1222021000116 is 6110001202221.

It can be written as a sum of positive squares in 2 ways, for example, as 414934375716 + 807086624400 = 644154^2 + 898380^2 .

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 35 ways as a sum of consecutive naturals, for example, 31042606 + ... + 31081946.

It is an arithmetic number, because the mean of its divisors is an integer number (33274250555).

Almost surely, 2^{1222021000116} is an apocalyptic number.

It is an amenable number.

1222021000116 is an abundant number, since it is smaller than the sum of its proper divisors (2371598059824).

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

1222021000116 is a wasteful number, since it uses less digits than its factorization.

1222021000116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56974 (or 56962 counting only the distinct ones).

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

Adding to 1222021000116 its reverse (6110001202221), we get a palindrome (7332022202337).

The spelling of 1222021000116 in words is "one trillion, two hundred twenty-two billion, twenty-one million, one hundred sixteen", and thus it is an aban number.