2101221323 has 8 divisors (see below), whose sum is σ = 2183371776. Its totient is φ = 2019969000.

The previous prime is 2101221313. The next prime is 2101221347. The reversal of 2101221323 is 3231221012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2101221323 - 2¹² = 2101217227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101221313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219761 + ... + 229122.

It is an arithmetic number, because the mean of its divisors is an integer number (272921472).

Almost surely, 2^2101221323 is an apocalyptic number.

2101221323 is a deficient number, since it is larger than the sum of its proper divisors (82150453).

2101221323 is a wasteful number, since it uses less digits than its factorization.

2101221323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449065.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2101221323 is about 45839.0807390375. The cubic root of 2101221323 is about 1280.8273709696.

Adding to 2101221323 its reverse (3231221012), we get a palindrome (5332442335).

The spelling of 2101221323 in words is "two billion, one hundred one million, two hundred twenty-one thousand, three hundred twenty-three".