1001112222021 has 16 divisors (see below), whose sum is σ = 1383563172864. Its totient is φ = 643458595824.

The previous prime is 1001112222001. The next prime is 1001112222041. The reversal of 1001112222021 is 1202222111001.

It is an interprime number because it is at equal distance from previous prime (1001112222001) and next prime (1001112222041).

It is not a de Polignac number, because 1001112222021 - 2¹⁸ = 1001111959877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001112222001) 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 15 ways as a sum of consecutive naturals, for example, 52976275 + ... + 52995168.

It is an arithmetic number, because the mean of its divisors is an integer number (86472698304).

Almost surely, 2^{1001112222021} is an apocalyptic number.

It is an amenable number.

1001112222021 is a deficient number, since it is larger than the sum of its proper divisors (382450950843).

1001112222021 is a wasteful number, since it uses less digits than its factorization.

1001112222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105971560.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1001112222021 its reverse (1202222111001), we get a palindrome (2203334333022).

The spelling of 1001112222021 in words is "one trillion, one billion, one hundred twelve million, two hundred twenty-two thousand, twenty-one".