1321240031101 has 4 divisors (see below), whose sum is σ = 1342899703804. Its totient is φ = 1299580358400.

The previous prime is 1321240031087. The next prime is 1321240031107. The reversal of 1321240031101 is 1011300421231.

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 246265055001 + 1074974976100 = 496251^2 + 1036810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321240031101 - 2⁷ = 1321240030973 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 (1321240031107) 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, 10829836260 + ... + 10829836381.

It is an arithmetic number, because the mean of its divisors is an integer number (335724925951).

Almost surely, 2^{1321240031101} is an apocalyptic number.

It is an amenable number.

1321240031101 is a deficient number, since it is larger than the sum of its proper divisors (21659672703).

1321240031101 is an equidigital number, since it uses as much as digits as its factorization.

1321240031101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21659672702.

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

Adding to 1321240031101 its reverse (1011300421231), we get a palindrome (2332540452332).

The spelling of 1321240031101 in words is "one trillion, three hundred twenty-one billion, two hundred forty million, thirty-one thousand, one hundred one".