2001102232021 has 4 divisors (see below), whose sum is σ = 2001123248544. Its totient is φ = 2001081215500.

The previous prime is 2001102232007. The next prime is 2001102232043. The reversal of 2001102232021 is 1202322011002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2001102232021 - 2³⁷ = 1863663278549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001102231986 and 2001102232004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001102232001) 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, 10364785 + ... + 10556086.

It is an arithmetic number, because the mean of its divisors is an integer number (500280812136).

Almost surely, 2^{2001102232021} is an apocalyptic number.

It is an amenable number.

2001102232021 is a deficient number, since it is larger than the sum of its proper divisors (21016523).

2001102232021 is an equidigital number, since it uses as much as digits as its factorization.

2001102232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21016522.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2001102232021 its reverse (1202322011002), we get a palindrome (3203424243023).

The spelling of 2001102232021 in words is "two trillion, one billion, one hundred two million, two hundred thirty-two thousand, twenty-one".