1012200001 has 4 divisors (see below), whose sum is σ = 1013192404. Its totient is φ = 1011207600.

The previous prime is 1012199999. The next prime is 1012200017. The reversal of 1012200001 is 1000022101.

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 586850625 + 425349376 = 24225^2 + 20624^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012200001 - 2¹ = 1012199999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012200701) 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, 494670 + ... + 496711.

It is an arithmetic number, because the mean of its divisors is an integer number (253298101).

Almost surely, 2^1012200001 is an apocalyptic number.

It is an amenable number.

1012200001 is a deficient number, since it is larger than the sum of its proper divisors (992403).

1012200001 is an equidigital number, since it uses as much as digits as its factorization.

1012200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992402.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1012200001 is about 31815.0907746623. The cubic root of 1012200001 is about 1004.0502404053.

Adding to 1012200001 its reverse (1000022101), we get a palindrome (2012222102).

It can be divided in two parts, 10 and 12200001, that multiplied together give a triangular number (122000010 = T₁₅₆₂₀).

The spelling of 1012200001 in words is "one billion, twelve million, two hundred thousand, one".