211203021401 has 4 divisors (see below), whose sum is σ = 211225354404. Its totient is φ = 211180688400.

The previous prime is 211203021347. The next prime is 211203021409. The reversal of 211203021401 is 104120302112.

211203021401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 95976040000 + 115226981401 = 309800^2 + 339451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211203021401 is a prime.

It is a super-2 number, since 2×211203021401² (a number of 23 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 211203021401.

It is not an unprimeable number, because it can be changed into a prime (211203021409) 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, 11152310 + ... + 11171231.

It is an arithmetic number, because the mean of its divisors is an integer number (52806338601).

Almost surely, 2^211203021401 is an apocalyptic number.

It is an amenable number.

211203021401 is a deficient number, since it is larger than the sum of its proper divisors (22333003).

211203021401 is an equidigital number, since it uses as much as digits as its factorization.

211203021401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22333002.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211203021401 its reverse (104120302112), we get a palindrome (315323323513).

The spelling of 211203021401 in words is "two hundred eleven billion, two hundred three million, twenty-one thousand, four hundred one".