1100021221233 has 18 divisors (see below), whose sum is σ = 1746498341042. Its totient is φ = 666679527360.

The previous prime is 1100021221223. The next prime is 1100021221241. The reversal of 1100021221233 is 3321221200011.

It can be written as a sum of positive squares in only one way, i.e., 1045448990784 + 54572230449 = 1022472^2 + 233607^2 .

It is not a de Polignac number, because 1100021221233 - 2¹⁶ = 1100021155697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100021221223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 505059160 + ... + 505061337.

Almost surely, 2^{1100021221233} is an apocalyptic number.

It is an amenable number.

1100021221233 is a deficient number, since it is larger than the sum of its proper divisors (646477119809).

1100021221233 is a wasteful number, since it uses less digits than its factorization.

1100021221233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010120525 (or 1010120511 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1100021221233 its reverse (3321221200011), we get a palindrome (4421242421244).

The spelling of 1100021221233 in words is "one trillion, one hundred billion, twenty-one million, two hundred twenty-one thousand, two hundred thirty-three".