1222099450981 has 4 divisors (see below), whose sum is σ = 1222106547852. Its totient is φ = 1222092354112.

The previous prime is 1222099450973. The next prime is 1222099450987. The reversal of 1222099450981 is 1890549902221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 370187064900 + 851912386081 = 608430^2 + 922991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222099450981 - 2³ = 1222099450973 is a prime.

It is a super-2 number, since 2×1222099450981² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222099450987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3283540 + ... + 3636733.

It is an arithmetic number, because the mean of its divisors is an integer number (305526636963).

Almost surely, 2^{1222099450981} is an apocalyptic number.

It is an amenable number.

1222099450981 is a deficient number, since it is larger than the sum of its proper divisors (7096871).

1222099450981 is an equidigital number, since it uses as much as digits as its factorization.

1222099450981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7096870.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 1222099450981 in words is "one trillion, two hundred twenty-two billion, ninety-nine million, four hundred fifty thousand, nine hundred eighty-one".