2100311301021 has 4 divisors (see below), whose sum is σ = 2800415068032. Its totient is φ = 1400207534012.

The previous prime is 2100311301017. The next prime is 2100311301029. The reversal of 2100311301021 is 1201031130012.

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 2100311301021 - 2² = 2100311301017 is a prime.

It is a super-2 number, since 2×2100311301021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100311301029) 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, 350051883501 + ... + 350051883506.

It is an arithmetic number, because the mean of its divisors is an integer number (700103767008).

Almost surely, 2^{2100311301021} is an apocalyptic number.

It is an amenable number.

2100311301021 is a deficient number, since it is larger than the sum of its proper divisors (700103767011).

2100311301021 is an equidigital number, since it uses as much as digits as its factorization.

2100311301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700103767010.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 2100311301021 its reverse (1201031130012), we get a palindrome (3301342431033).

The spelling of 2100311301021 in words is "two trillion, one hundred billion, three hundred eleven million, three hundred one thousand, twenty-one".