1222110021001 has 4 divisors (see below), whose sum is σ = 1222193348100. Its totient is φ = 1222026693904.

The previous prime is 1222110020953. The next prime is 1222110021019. The reversal of 1222110021001 is 1001200112221.

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 352451192976 + 869658828025 = 593676^2 + 932555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222110021001 is a prime.

It is a super-2 number, since 2×1222110021001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222110021101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41641546 + ... + 41670883.

It is an arithmetic number, because the mean of its divisors is an integer number (305548337025).

Almost surely, 2^{1222110021001} is an apocalyptic number.

It is an amenable number.

1222110021001 is a deficient number, since it is larger than the sum of its proper divisors (83327099).

1222110021001 is an equidigital number, since it uses as much as digits as its factorization.

1222110021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83327098.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1222110021001 its reverse (1001200112221), we get a palindrome (2223310133222).

The spelling of 1222110021001 in words is "one trillion, two hundred twenty-two billion, one hundred ten million, twenty-one thousand, one".