1402020221 has 8 divisors (see below), whose sum is σ = 1605376704. Its totient is φ = 1199430720.

The previous prime is 1402020181. The next prime is 1402020271. The reversal of 1402020221 is 1220202041.

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 1402020221 - 2²² = 1397825917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1402020196 and 1402020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402020271) 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, 187820 + ... + 195141.

It is an arithmetic number, because the mean of its divisors is an integer number (200672088).

Almost surely, 2^1402020221 is an apocalyptic number.

It is an amenable number.

1402020221 is a deficient number, since it is larger than the sum of its proper divisors (203356483).

1402020221 is an equidigital number, since it uses as much as digits as its factorization.

1402020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383491.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1402020221 is about 37443.5604743993. The cubic root of 1402020221 is about 1119.2267784369.

Adding to 1402020221 its reverse (1220202041), we get a palindrome (2622222262).

The spelling of 1402020221 in words is "one billion, four hundred two million, twenty thousand, two hundred twenty-one".