1011202001 has 4 divisors (see below), whose sum is σ = 1021214004. Its totient is φ = 1001190000.

The previous prime is 1011201991. The next prime is 1011202013. The reversal of 1011202001 is 1002021101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1002021101 = 101 ⋅9921001.

It can be written as a sum of positive squares in 2 ways, for example, as 973502401 + 37699600 = 31201^2 + 6140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011202001 - 2⁶ = 1011201937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011202001.

It is not an unprimeable number, because it can be changed into a prime (1011202091) 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, 5005850 + ... + 5006051.

It is an arithmetic number, because the mean of its divisors is an integer number (255303501).

Almost surely, 2^1011202001 is an apocalyptic number.

It is an amenable number.

1011202001 is a deficient number, since it is larger than the sum of its proper divisors (10012003).

1011202001 is a wasteful number, since it uses less digits than its factorization.

1011202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10012002.

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

The square root of 1011202001 is about 31799.4025258337. The cubic root of 1011202001 is about 1003.7201437026.

Adding to 1011202001 its reverse (1002021101), we get a palindrome (2013223102).

Subtracting from 1011202001 its reverse (1002021101), we obtain a square (9180900 = 3030²).

The spelling of 1011202001 in words is "one billion, eleven million, two hundred two thousand, one".