12010020001 has 6 divisors (see below), whose sum is σ = 13970839650. Its totient is φ = 10294302816.

The previous prime is 12010019993. The next prime is 12010020047. The reversal of 12010020001 is 10002001021.

It can be written as a sum of positive squares in only one way, i.e., 10907713600 + 1102306401 = 104440^2 + 33201^2 .

It is not a de Polignac number, because 12010020001 - 2³ = 12010019993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12010020601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122551176 + ... + 122551273.

It is an arithmetic number, because the mean of its divisors is an integer number (2328473275).

Almost surely, 2^12010020001 is an apocalyptic number.

It is an amenable number.

12010020001 is a deficient number, since it is larger than the sum of its proper divisors (1960819649).

12010020001 is an equidigital number, since it uses as much as digits as its factorization.

12010020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245102463 (or 245102456 counting only the distinct ones).

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

Adding to 12010020001 its reverse (10002001021), we get a palindrome (22012021022).

The spelling of 12010020001 in words is "twelve billion, ten million, twenty thousand, one".