211212121111203 has 16 divisors (see below), whose sum is σ = 282245477335200. Its totient is φ = 140493427501056.

The previous prime is 211212121111141. The next prime is 211212121111289. The reversal of 211212121111203 is 302111121212112.

It is not a de Polignac number, because 211212121111203 - 2⁶ = 211212121111139 is a prime.

It is a super-2 number, since 2×211212121111203² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211212121111203.

It is not an unprimeable number, because it can be changed into a prime (211212121116203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207140901 + ... + 208158057.

It is an arithmetic number, because the mean of its divisors is an integer number (17640342333450).

Almost surely, 2^{211212121111203} is an apocalyptic number.

211212121111203 is a deficient number, since it is larger than the sum of its proper divisors (71033356223997).

211212121111203 is a wasteful number, since it uses less digits than its factorization.

211212121111203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171766.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 211212121111203 its reverse (302111121212112), we get a palindrome (513323242323315).

The spelling of 211212121111203 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, two hundred three".