1001030111221 has 32 divisors (see below), whose sum is σ = 1171729428480. Its totient is φ = 837528854400.

The previous prime is 1001030111219. The next prime is 1001030111239. The reversal of 1001030111221 is 1221110301001.

It is a happy number.

It is not a de Polignac number, because 1001030111221 - 2¹ = 1001030111219 is a prime.

It is a super-2 number, since 2×1001030111221² (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 (1001030111201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25786336 + ... + 25825126.

It is an arithmetic number, because the mean of its divisors is an integer number (36616544640).

Almost surely, 2^{1001030111221} is an apocalyptic number.

It is an amenable number.

1001030111221 is a deficient number, since it is larger than the sum of its proper divisors (170699317259).

1001030111221 is a wasteful number, since it uses less digits than its factorization.

1001030111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39385.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1001030111221 its reverse (1221110301001), we get a palindrome (2222140412222).

The spelling of 1001030111221 in words is "one trillion, one billion, thirty million, one hundred eleven thousand, two hundred twenty-one".