1421062221 has 4 divisors (see below), whose sum is σ = 1894749632. Its totient is φ = 947374812.

The previous prime is 1421062217. The next prime is 1421062243. The reversal of 1421062221 is 1222601241.

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 not a de Polignac number, because 1421062221 - 2² = 1421062217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421062211) 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, 236843701 + ... + 236843706.

It is an arithmetic number, because the mean of its divisors is an integer number (473687408).

Almost surely, 2^1421062221 is an apocalyptic number.

It is an amenable number.

1421062221 is a deficient number, since it is larger than the sum of its proper divisors (473687411).

1421062221 is an equidigital number, since it uses as much as digits as its factorization.

1421062221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473687410.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1421062221 is about 37696.9789373101. The cubic root of 1421062221 is about 1124.2710592436.

Adding to 1421062221 its reverse (1222601241), we get a palindrome (2643663462).

The spelling of 1421062221 in words is "one billion, four hundred twenty-one million, sixty-two thousand, two hundred twenty-one".