111121212203 has 2 divisors, whose sum is σ = 111121212204. Its totient is φ = 111121212202.

The previous prime is 111121212193. The next prime is 111121212221. The reversal of 111121212203 is 302212121111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111121212203 - 2⁴ = 111121212187 is a prime.

It is a super-2 number, since 2×111121212203² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111121212253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560606101 + 55560606102.

It is an arithmetic number, because the mean of its divisors is an integer number (55560606102).

Almost surely, 2^111121212203 is an apocalyptic number.

111121212203 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121212203 is an equidigital number, since it uses as much as digits as its factorization.

111121212203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111121212203 its reverse (302212121111), we get a palindrome (413333333314).

The spelling of 111121212203 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twelve thousand, two hundred three".