1402222221 has 6 divisors (see below), whose sum is σ = 2025432110. Its totient is φ = 934814808.

The previous prime is 1402222207. The next prime is 1402222229. The reversal of 1402222221 is 1222222041.

It can be written as a sum of positive squares in only one way, i.e., 1397937321 + 4284900 = 37389^2 + 2070^2 .

It is not a de Polignac number, because 1402222221 - 2¹³ = 1402214029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1402222194 and 1402222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402222229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77901226 + ... + 77901243.

Almost surely, 2^1402222221 is an apocalyptic number.

It is an amenable number.

1402222221 is a deficient number, since it is larger than the sum of its proper divisors (623209889).

1402222221 is a wasteful number, since it uses less digits than its factorization.

1402222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155802475 (or 155802472 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1402222221 is about 37446.2577703033. The cubic root of 1402222221 is about 1119.2805277692.

Adding to 1402222221 its reverse (1222222041), we get a palindrome (2624444262).

The spelling of 1402222221 in words is "one billion, four hundred two million, two hundred twenty-two thousand, two hundred twenty-one".