1001222221021 has 8 divisors (see below), whose sum is σ = 1092959606304. Its totient is φ = 909604366320.

The previous prime is 1001222221019. The next prime is 1001222221063. The reversal of 1001222221021 is 1201222221001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001222221021 - 2¹ = 1001222221019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001222220986 and 1001222221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001222221721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29865126 + ... + 29898631.

It is an arithmetic number, because the mean of its divisors is an integer number (136619950788).

Almost surely, 2^{1001222221021} is an apocalyptic number.

1001222221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001222221021 is a deficient number, since it is larger than the sum of its proper divisors (91737385283).

1001222221021 is a wasteful number, since it uses less digits than its factorization.

1001222221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59765291.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1001222221021 its reverse (1201222221001), we get a palindrome (2202444442022).

The spelling of 1001222221021 in words is "one trillion, one billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty-one".