1020212401 has 4 divisors (see below), whose sum is σ = 1098690292. Its totient is φ = 941734512.

The previous prime is 1020212393. The next prime is 1020212441. The reversal of 1020212401 is 1042120201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 270767025 + 749445376 = 16455^2 + 27376^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020212401 - 2³ = 1020212393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 78477877 = 1020212401 / (1 + 0 + 2 + 0 + 2 + 1 + 2 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020212441) 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 3 ways as a sum of consecutive naturals, for example, 39238926 + ... + 39238951.

It is an arithmetic number, because the mean of its divisors is an integer number (274672573).

Almost surely, 2^1020212401 is an apocalyptic number.

It is an amenable number.

1020212401 is a deficient number, since it is larger than the sum of its proper divisors (78477891).

1020212401 is an equidigital number, since it uses as much as digits as its factorization.

1020212401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78477890.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1020212401 is about 31940.7639388916. The cubic root of 1020212401 is about 1006.6925764984.

Adding to 1020212401 its reverse (1042120201), we get a palindrome (2062332602).

The spelling of 1020212401 in words is "one billion, twenty million, two hundred twelve thousand, four hundred one".