2120321101 has 4 divisors (see below), whose sum is σ = 2120481532. Its totient is φ = 2120160672.

The previous prime is 2120321087. The next prime is 2120321197. The reversal of 2120321101 is 1011230212.

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 955737225 + 1164583876 = 30915^2 + 34126^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120321101 - 2¹⁹ = 2119796813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120322101) 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, 58416 + ... + 87481.

It is an arithmetic number, because the mean of its divisors is an integer number (530120383).

Almost surely, 2^2120321101 is an apocalyptic number.

It is an amenable number.

2120321101 is a deficient number, since it is larger than the sum of its proper divisors (160431).

2120321101 is a wasteful number, since it uses less digits than its factorization.

2120321101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160430.

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

The square root of 2120321101 is about 46046.9445348983. The cubic root of 2120321101 is about 1284.6965123800.

Adding to 2120321101 its reverse (1011230212), we get a palindrome (3131551313).

The spelling of 2120321101 in words is "two billion, one hundred twenty million, three hundred twenty-one thousand, one hundred one".