1201310003021 has 4 divisors (see below), whose sum is σ = 1201541519100. Its totient is φ = 1201078486944.

The previous prime is 1201310002979. The next prime is 1201310003029. The reversal of 1201310003021 is 1203000131021.

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 1100558355625 + 100751647396 = 1049075^2 + 317414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201310003021 - 2⁶ = 1201310002957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201310002987 and 1201310003005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201310003029) 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, 115750256 + ... + 115760633.

It is an arithmetic number, because the mean of its divisors is an integer number (300385379775).

Almost surely, 2^{1201310003021} is an apocalyptic number.

It is an amenable number.

1201310003021 is a deficient number, since it is larger than the sum of its proper divisors (231516079).

1201310003021 is an equidigital number, since it uses as much as digits as its factorization.

1201310003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231516078.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 1201310003021 its reverse (1203000131021), we get a palindrome (2404310134042).

The spelling of 1201310003021 in words is "one trillion, two hundred one billion, three hundred ten million, three thousand, twenty-one".