1011020201 has 4 divisors (see below), whose sum is σ = 1021030404. Its totient is φ = 1001010000.

The previous prime is 1011020173. The next prime is 1011020221. The reversal of 1011020201 is 1020201101.

1011020201 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.

It can be written as a sum of positive squares in 2 ways, for example, as 613057600 + 397962601 = 24760^2 + 19949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011020201 - 2⁶ = 1011020137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011020221) 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, 5004950 + ... + 5005151.

It is an arithmetic number, because the mean of its divisors is an integer number (255257601).

Almost surely, 2^1011020201 is an apocalyptic number.

It is an amenable number.

1011020201 is a deficient number, since it is larger than the sum of its proper divisors (10010203).

1011020201 is a wasteful number, since it uses less digits than its factorization.

1011020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010202.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1011020201 is about 31796.5438530668. The cubic root of 1011020201 is about 1003.6599884752.

Adding to 1011020201 its reverse (1020201101), we get a palindrome (2031221302).

Subtracting 1011020201 from its reverse (1020201101), we obtain a square (9180900 = 3030²).

It can be divided in two parts, 101 and 1020201, that multiplied together give a palindrome (103040301).

The spelling of 1011020201 in words is "one billion, eleven million, twenty thousand, two hundred one".