1021420001 has 4 divisors (see below), whose sum is σ = 1167337152. Its totient is φ = 875502852.

The previous prime is 1021419989. The next prime is 1021420013. The reversal of 1021420001 is 1000241201.

1021420001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (1021419989) and next prime (1021420013).

It is not a de Polignac number, because 1021420001 - 2¹⁰ = 1021418977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021420091) 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, 72958565 + ... + 72958578.

It is an arithmetic number, because the mean of its divisors is an integer number (291834288).

Almost surely, 2^1021420001 is an apocalyptic number.

It is an amenable number.

1021420001 is a deficient number, since it is larger than the sum of its proper divisors (145917151).

1021420001 is an equidigital number, since it uses as much as digits as its factorization.

1021420001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145917150.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1021420001 is about 31959.6620914552. The cubic root of 1021420001 is about 1007.0896188567.

Adding to 1021420001 its reverse (1000241201), we get a palindrome (2021661202).

The spelling of 1021420001 in words is "one billion, twenty-one million, four hundred twenty thousand, one".