2111020321 has 4 divisors (see below), whose sum is σ = 2111761044. Its totient is φ = 2110279600.

The previous prime is 2111020277. The next prime is 2111020337. The reversal of 2111020321 is 1230201112.

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 730080400 + 1380939921 = 27020^2 + 37161^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111020321 - 2¹³ = 2111012129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111021321) 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, 366070 + ... + 371791.

It is an arithmetic number, because the mean of its divisors is an integer number (527940261).

Almost surely, 2^2111020321 is an apocalyptic number.

It is an amenable number.

2111020321 is a deficient number, since it is larger than the sum of its proper divisors (740723).

2111020321 is an equidigital number, since it uses as much as digits as its factorization.

2111020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740722.

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

The square root of 2111020321 is about 45945.8411719712. The cubic root of 2111020321 is about 1282.8153203806.

Adding to 2111020321 its reverse (1230201112), we get a palindrome (3341221433).

The spelling of 2111020321 in words is "two billion, one hundred eleven million, twenty thousand, three hundred twenty-one".