1121310220321 has 4 divisors (see below), whose sum is σ = 1136670634372. Its totient is φ = 1105949806272.

The previous prime is 1121310220253. The next prime is 1121310220337. The reversal of 1121310220321 is 1230220131211.

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 785281317921 + 336028902400 = 886161^2 + 579680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121310220321 - 2¹³ = 1121310212129 is a prime.

It is a super-2 number, since 2×1121310220321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121310220621) 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, 7680206916 + ... + 7680207061.

It is an arithmetic number, because the mean of its divisors is an integer number (284167658593).

Almost surely, 2^{1121310220321} is an apocalyptic number.

It is an amenable number.

1121310220321 is a deficient number, since it is larger than the sum of its proper divisors (15360414051).

1121310220321 is an equidigital number, since it uses as much as digits as its factorization.

1121310220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15360414050.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1121310220321 its reverse (1230220131211), we get a palindrome (2351530351532).

The spelling of 1121310220321 in words is "one trillion, one hundred twenty-one billion, three hundred ten million, two hundred twenty thousand, three hundred twenty-one".