1001203132021 has 4 divisors (see below), whose sum is σ = 1001223175372. Its totient is φ = 1001183088672.

The previous prime is 1001203132003. The next prime is 1001203132063. The reversal of 1001203132021 is 1202313021001.

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 669295791025 + 331907340996 = 818105^2 + 576114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001203132021 - 2⁷ = 1001203131893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001203131986 and 1001203132004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001203132001) 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, 9946560 + ... + 10046713.

It is an arithmetic number, because the mean of its divisors is an integer number (250305793843).

Almost surely, 2^{1001203132021} is an apocalyptic number.

It is an amenable number.

1001203132021 is a deficient number, since it is larger than the sum of its proper divisors (20043351).

1001203132021 is an equidigital number, since it uses as much as digits as its factorization.

1001203132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20043350.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1001203132021 its reverse (1202313021001), we get a palindrome (2203516153022).

The spelling of 1001203132021 in words is "one trillion, one billion, two hundred three million, one hundred thirty-two thousand, twenty-one".