1133123220221 has 4 divisors (see below), whose sum is σ = 1143150859452. Its totient is φ = 1123095580992.

The previous prime is 1133123220217. The next prime is 1133123220227. The reversal of 1133123220221 is 1220223213311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 519077020900 + 614046199321 = 720470^2 + 783611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1133123220221 - 2² = 1133123220217 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 (1133123220227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5013819446 + ... + 5013819671.

It is an arithmetic number, because the mean of its divisors is an integer number (285787714863).

Almost surely, 2^{1133123220221} is an apocalyptic number.

It is an amenable number.

1133123220221 is a deficient number, since it is larger than the sum of its proper divisors (10027639231).

1133123220221 is a wasteful number, since it uses less digits than its factorization.

1133123220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10027639230.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1133123220221 its reverse (1220223213311), we get a palindrome (2353346433532).

The spelling of 1133123220221 in words is "one trillion, one hundred thirty-three billion, one hundred twenty-three million, two hundred twenty thousand, two hundred twenty-one".