1211210111203 has 2 divisors, whose sum is σ = 1211210111204. Its totient is φ = 1211210111202.

The previous prime is 1211210111201. The next prime is 1211210111213. The reversal of 1211210111203 is 3021110121121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211210111203 - 2¹ = 1211210111201 is a prime.

It is a super-2 number, since 2×1211210111203² (a number of 25 digits) contains 22 as substring.

Together with 1211210111201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1211210111201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605605055601 + 605605055602.

It is an arithmetic number, because the mean of its divisors is an integer number (605605055602).

Almost surely, 2^{1211210111203} is an apocalyptic number.

1211210111203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211210111203 is an equidigital number, since it uses as much as digits as its factorization.

1211210111203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1211210111203 its reverse (3021110121121), we get a palindrome (4232320232324).

The spelling of 1211210111203 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred eleven thousand, two hundred three".