211210211202101 has 4 divisors (see below), whose sum is σ = 211211444235372. Its totient is φ = 211208978168832.

The previous prime is 211210211201999. The next prime is 211210211202181. The reversal of 211210211202101 is 101202112012112.

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 158387913471076 + 52822297731025 = 12585226^2 + 7267895^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210211202101 - 2¹⁴ = 211210211185717 is a prime.

It is a super-2 number, since 2×211210211202101² (a number of 29 digits) contains 22 as substring.

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 211210211202101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210211202181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616259660 + ... + 616602293.

It is an arithmetic number, because the mean of its divisors is an integer number (52802861058843).

Almost surely, 2^{211210211202101} is an apocalyptic number.

It is an amenable number.

211210211202101 is a deficient number, since it is larger than the sum of its proper divisors (1233033271).

211210211202101 is a wasteful number, since it uses less digits than its factorization.

211210211202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233033270.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211210211202101 its reverse (101202112012112), we get a palindrome (312412323214213).

The spelling of 211210211202101 in words is "two hundred eleven trillion, two hundred ten billion, two hundred eleven million, two hundred two thousand, one hundred one".