1100020031221 has 8 divisors (see below), whose sum is σ = 1111557802880. Its totient is φ = 1088486287488.

The previous prime is 1100020031191. The next prime is 1100020031233. The reversal of 1100020031221 is 1221300200011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100020031221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100020031321) 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, 456351 + ... + 1551868.

It is an arithmetic number, because the mean of its divisors is an integer number (138944725360).

Almost surely, 2^{1100020031221} is an apocalyptic number.

It is an amenable number.

1100020031221 is a deficient number, since it is larger than the sum of its proper divisors (11537771659).

1100020031221 is an equidigital number, since it uses as much as digits as its factorization.

1100020031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013963.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1100020031221 its reverse (1221300200011), we get a palindrome (2321320231232).

The spelling of 1100020031221 in words is "one trillion, one hundred billion, twenty million, thirty-one thousand, two hundred twenty-one".