212000001101001 has 12 divisors (see below), whose sum is σ = 307492855449780. Its totient is φ = 140746888696320.

The previous prime is 212000001100999. The next prime is 212000001101017. The reversal of 212000001101001 is 100101100000212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 141269293976976 + 70730707124025 = 11885676^2 + 8410155^2 .

It is not a de Polignac number, because 212000001101001 - 2¹ = 212000001100999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (212000001111001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48870445296 + ... + 48870449633.

It is an arithmetic number, because the mean of its divisors is an integer number (25624404620815).

Almost surely, 2^{212000001101001} is an apocalyptic number.

It is an amenable number.

212000001101001 is a deficient number, since it is larger than the sum of its proper divisors (95492854348779).

212000001101001 is a wasteful number, since it uses less digits than its factorization.

212000001101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97740895176 (or 97740895173 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 212000001101001 its reverse (100101100000212), we get a palindrome (312101101101213).

The spelling of 212000001101001 in words is "two hundred twelve trillion, one million, one hundred one thousand, one".