2120431105 has 16 divisors (see below), whose sum is σ = 2741218704. Its totient is φ = 1565303040.

The previous prime is 2120431087. The next prime is 2120431147. The reversal of 2120431105 is 5011340212.

It can be written as a sum of positive squares in 8 ways, for example, as 92910321 + 2027520784 = 9639^2 + 45028^2 .

It is not a de Polignac number, because 2120431105 - 2⁹ = 2120430593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318915 + ... + 325495.

It is an arithmetic number, because the mean of its divisors is an integer number (171326169).

Almost surely, 2^2120431105 is an apocalyptic number.

It is an amenable number.

2120431105 is a deficient number, since it is larger than the sum of its proper divisors (620787599).

2120431105 is a wasteful number, since it uses less digits than its factorization.

2120431105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11556.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2120431105 is about 46048.1389960550. The cubic root of 2120431105 is about 1284.7187290325.

Adding to 2120431105 its reverse (5011340212), we get a palindrome (7131771317).

The spelling of 2120431105 in words is "two billion, one hundred twenty million, four hundred thirty-one thousand, one hundred five".