12020212001 has 18 divisors (see below), whose sum is σ = 14481533430. Its totient is φ = 9947727552.

The previous prime is 12020211997. The next prime is 12020212033. The reversal of 12020212001 is 10021202021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 784000000 + 11236212001 = 28000^2 + 106001^2 .

It is not a de Polignac number, because 12020212001 - 2² = 12020211997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020212201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 104636 + ... + 187053.

It is an arithmetic number, because the mean of its divisors is an integer number (804529635).

Almost surely, 2^12020212001 is an apocalyptic number.

It is an amenable number.

12020212001 is a deficient number, since it is larger than the sum of its proper divisors (2461321429).

12020212001 is an equidigital number, since it uses as much as digits as its factorization.

12020212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291761 (or 291725 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12020212001 its reverse (10021202021), we get a palindrome (22041414022).

The spelling of 12020212001 in words is "twelve billion, twenty million, two hundred twelve thousand, one".