212102001 has 6 divisors (see below), whose sum is σ = 306369570. Its totient is φ = 141401328.

The previous prime is 212101993. The next prime is 212102003. The reversal of 212102001 is 100201212.

212102001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 207792225 + 4309776 = 14415^2 + 2076^2 .

It is not a de Polignac number, because 212102001 - 2³ = 212101993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 23566889 = 212102001 / (2 + 1 + 2 + 1 + 0 + 2 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (212102003) 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, 11783436 + ... + 11783453.

It is an arithmetic number, because the mean of its divisors is an integer number (51061595).

Almost surely, 2^212102001 is an apocalyptic number.

It is an amenable number.

212102001 is a deficient number, since it is larger than the sum of its proper divisors (94267569).

212102001 is a wasteful number, since it uses less digits than its factorization.

212102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23566895 (or 23566892 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 212102001 is about 14563.7220860603. The cubic root of 212102001 is about 596.3688100991.

Adding to 212102001 its reverse (100201212), we get a palindrome (312303213).

The spelling of 212102001 in words is "two hundred twelve million, one hundred two thousand, one".