212120011001 has 4 divisors (see below), whose sum is σ = 212885787492. Its totient is φ = 211354234512.

The previous prime is 212120010983. The next prime is 212120011039. The reversal of 212120011001 is 100110021212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87571013776 + 124548997225 = 295924^2 + 352915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212120011001 is a prime.

It is a super-2 number, since 2×212120011001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212120010001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382887830 + ... + 382888383.

It is an arithmetic number, because the mean of its divisors is an integer number (53221446873).

Almost surely, 2^212120011001 is an apocalyptic number.

It is an amenable number.

212120011001 is a deficient number, since it is larger than the sum of its proper divisors (765776491).

212120011001 is an equidigital number, since it uses as much as digits as its factorization.

212120011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765776490.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 212120011001 its reverse (100110021212), we get a palindrome (312230032213).

The spelling of 212120011001 in words is "two hundred twelve billion, one hundred twenty million, eleven thousand, one".