1123220110021 has 4 divisors (see below), whose sum is σ = 1123282318444. Its totient is φ = 1123157901600.

The previous prime is 1123220109961. The next prime is 1123220110091. The reversal of 1123220110021 is 1200110223211.

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 522672607521 + 600547502500 = 722961^2 + 774950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123220110021 - 2¹⁷ = 1123219978949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123220109977 and 1123220110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123220110091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31077120 + ... + 31113241.

It is an arithmetic number, because the mean of its divisors is an integer number (280820579611).

Almost surely, 2^{1123220110021} is an apocalyptic number.

It is an amenable number.

1123220110021 is a deficient number, since it is larger than the sum of its proper divisors (62208423).

1123220110021 is an equidigital number, since it uses as much as digits as its factorization.

1123220110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62208422.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1123220110021 its reverse (1200110223211), we get a palindrome (2323330333232).

The spelling of 1123220110021 in words is "one trillion, one hundred twenty-three billion, two hundred twenty million, one hundred ten thousand, twenty-one".