2354021221 has 4 divisors (see below), whose sum is σ = 2355164352. Its totient is φ = 2352878092.

The previous prime is 2354021209. The next prime is 2354021231. The reversal of 2354021221 is 1221204532.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2354021221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2354021192 and 2354021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2354021231) 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, 568471 + ... + 572596.

It is an arithmetic number, because the mean of its divisors is an integer number (588791088).

Almost surely, 2^2354021221 is an apocalyptic number.

It is an amenable number.

2354021221 is a deficient number, since it is larger than the sum of its proper divisors (1143131).

2354021221 is a wasteful number, since it uses less digits than its factorization.

2354021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143130.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2354021221 is about 48518.2565742010. The cubic root of 2354021221 is about 1330.2607928865.

Adding to 2354021221 its reverse (1221204532), we get a palindrome (3575225753).

The spelling of 2354021221 in words is "two billion, three hundred fifty-four million, twenty-one thousand, two hundred twenty-one".