2103520321 has 16 divisors (see below), whose sum is σ = 2425019904. Its totient is φ = 1787333184.

The previous prime is 2103520319. The next prime is 2103520327. The reversal of 2103520321 is 1230253012.

It is not a de Polignac number, because 2103520321 - 2¹ = 2103520319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2103520327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442071 + ... + 446803.

It is an arithmetic number, because the mean of its divisors is an integer number (151563744).

Almost surely, 2^2103520321 is an apocalyptic number.

It is an amenable number.

2103520321 is a deficient number, since it is larger than the sum of its proper divisors (321499583).

2103520321 is a wasteful number, since it uses less digits than its factorization.

2103520321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2103520321 is about 45864.1507170906. The cubic root of 2103520321 is about 1281.2943289648.

Adding to 2103520321 its reverse (1230253012), we get a palindrome (3333773333).

It can be divided in two parts, 210 and 3520321, that added together give a triangular number (3520531 = T₂₆₅₃).

The spelling of 2103520321 in words is "two billion, one hundred three million, five hundred twenty thousand, three hundred twenty-one".