1420221021 has 8 divisors (see below), whose sum is σ = 2005017984. Its totient is φ = 891119040.

The previous prime is 1420221013. The next prime is 1420221029. The reversal of 1420221021 is 1201220241.

It is an interprime number because it is at equal distance from previous prime (1420221013) and next prime (1420221029).

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

It is not a de Polignac number, because 1420221021 - 2³ = 1420221013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420221029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13923685 + ... + 13923786.

It is an arithmetic number, because the mean of its divisors is an integer number (250627248).

Almost surely, 2^1420221021 is an apocalyptic number.

It is an amenable number.

1420221021 is a deficient number, since it is larger than the sum of its proper divisors (584796963).

1420221021 is a wasteful number, since it uses less digits than its factorization.

1420221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27847491.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1420221021 is about 37685.8198928987. The cubic root of 1420221021 is about 1124.0491774539.

Adding to 1420221021 its reverse (1201220241), we get a palindrome (2621441262).

The spelling of 1420221021 in words is "one billion, four hundred twenty million, two hundred twenty-one thousand, twenty-one".