10312001002021 has 4 divisors (see below), whose sum is σ = 10667587243500. Its totient is φ = 9956414760544.

The previous prime is 10312001001949. The next prime is 10312001002067. The reversal of 10312001002021 is 12020010021301.

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 8085429693121 + 2226571308900 = 2843489^2 + 1492170^2 .

It is a cyclic number.

It is not a de Polignac number, because 10312001002021 - 2¹⁹ = 10312000477733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10312001001992 and 10312001002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10312001062021) 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, 177793120696 + ... + 177793120753.

It is an arithmetic number, because the mean of its divisors is an integer number (2666896810875).

Almost surely, 2^{10312001002021} is an apocalyptic number.

It is an amenable number.

10312001002021 is a deficient number, since it is larger than the sum of its proper divisors (355586241479).

10312001002021 is an equidigital number, since it uses as much as digits as its factorization.

10312001002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355586241478.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10312001002021 its reverse (12020010021301), we get a palindrome (22332011023322).

The spelling of 10312001002021 in words is "ten trillion, three hundred twelve billion, one million, two thousand, twenty-one".