2101214321 has 4 divisors (see below), whose sum is σ = 2119809252. Its totient is φ = 2082619392.

The previous prime is 2101214303. The next prime is 2101214329. The reversal of 2101214321 is 1234121012.

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 36784225 + 2064430096 = 6065^2 + 45436^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101214321 - 2¹⁰ = 2101213297 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101214321.

It is not an unprimeable number, because it can be changed into a prime (2101214329) 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, 9297296 + ... + 9297521.

It is an arithmetic number, because the mean of its divisors is an integer number (529952313).

Almost surely, 2^2101214321 is an apocalyptic number.

It is an amenable number.

2101214321 is a deficient number, since it is larger than the sum of its proper divisors (18594931).

2101214321 is a wasteful number, since it uses less digits than its factorization.

2101214321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18594930.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2101214321 is about 45839.0043630967. The cubic root of 2101214321 is about 1280.8259482473.

Adding to 2101214321 its reverse (1234121012), we get a palindrome (3335335333).

The spelling of 2101214321 in words is "two billion, one hundred one million, two hundred fourteen thousand, three hundred twenty-one".