2820212001 has 6 divisors (see below), whose sum is σ = 4073639570. Its totient is φ = 1880141328.

The previous prime is 2820211987. The next prime is 2820212029. The reversal of 2820212001 is 1002120282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2121984225 + 698227776 = 46065^2 + 26424^2 .

It is not a de Polignac number, because 2820212001 - 2¹⁰ = 2820210977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2820212081) 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, 156678436 + ... + 156678453.

Almost surely, 2^2820212001 is an apocalyptic number.

It is an amenable number.

2820212001 is a deficient number, since it is larger than the sum of its proper divisors (1253427569).

2820212001 is a wasteful number, since it uses less digits than its factorization.

2820212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313356895 (or 313356892 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2820212001 is about 53105.6682567878. The cubic root of 2820212001 is about 1412.8430473443.

Adding to 2820212001 its reverse (1002120282), we get a palindrome (3822332283).

The spelling of 2820212001 in words is "two billion, eight hundred twenty million, two hundred twelve thousand, one".