211210020001 has 4 divisors (see below), whose sum is σ = 215195114772. Its totient is φ = 207224925232.

The previous prime is 211210019971. The next prime is 211210020013. The reversal of 211210020001 is 100020012112.

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 74310760000 + 136899260001 = 272600^2 + 369999^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210020001 - 2²³ = 211201631393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211210020001.

It is not an unprimeable number, because it can be changed into a prime (211210020061) 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, 1992547306 + ... + 1992547411.

It is an arithmetic number, because the mean of its divisors is an integer number (53798778693).

Almost surely, 2^211210020001 is an apocalyptic number.

It is an amenable number.

211210020001 is a deficient number, since it is larger than the sum of its proper divisors (3985094771).

211210020001 is an equidigital number, since it uses as much as digits as its factorization.

211210020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985094770.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 211210020001 its reverse (100020012112), we get a palindrome (311230032113).

The spelling of 211210020001 in words is "two hundred eleven billion, two hundred ten million, twenty thousand, one".