1002111332021 has 4 divisors (see below), whose sum is σ = 1061059057452. Its totient is φ = 943163606592.

The previous prime is 1002111332011. The next prime is 1002111332039. The reversal of 1002111332021 is 1202331112001.

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 726055663921 + 276055668100 = 852089^2 + 525410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002111332021 - 2¹⁸ = 1002111069877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 58947725413 = 1002111332021 / (1 + 0 + 0 + 2 + 1 + 1 + 1 + 3 + 3 + 2 + 0 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002111332011) 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, 29473862690 + ... + 29473862723.

It is an arithmetic number, because the mean of its divisors is an integer number (265264764363).

Almost surely, 2^{1002111332021} is an apocalyptic number.

It is an amenable number.

1002111332021 is a deficient number, since it is larger than the sum of its proper divisors (58947725431).

1002111332021 is an equidigital number, since it uses as much as digits as its factorization.

1002111332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58947725430.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1002111332021 its reverse (1202331112001), we get a palindrome (2204442444022).

The spelling of 1002111332021 in words is "one trillion, two billion, one hundred eleven million, three hundred thirty-two thousand, twenty-one".