1100031111221 has 8 divisors (see below), whose sum is σ = 1258397798784. Its totient is φ = 941969270160.

The previous prime is 1100031111169. The next prime is 1100031111227. The reversal of 1100031111221 is 1221111300011.

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 1100031111221 - 2¹⁰ = 1100031110197 is a prime.

It is a super-3 number, since 3×1100031111221³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1100031111196 and 1100031111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100031111227) 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, 76203890 + ... + 76218323.

It is an arithmetic number, because the mean of its divisors is an integer number (157299724848).

Almost surely, 2^{1100031111221} is an apocalyptic number.

It is an amenable number.

1100031111221 is a deficient number, since it is larger than the sum of its proper divisors (158366687563).

1100031111221 is a wasteful number, since it uses less digits than its factorization.

1100031111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152423251.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1100031111221 its reverse (1221111300011), we get a palindrome (2321142411232).

The spelling of 1100031111221 in words is "one trillion, one hundred billion, thirty-one million, one hundred eleven thousand, two hundred twenty-one".