1221110230111 has 2 divisors, whose sum is σ = 1221110230112. Its totient is φ = 1221110230110.

The previous prime is 1221110230103. The next prime is 1221110230157. The reversal of 1221110230111 is 1110320111221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221110230111 - 2³ = 1221110230103 is a prime.

It is a super-2 number, since 2×1221110230111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221110230211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610555115055 + 610555115056.

It is an arithmetic number, because the mean of its divisors is an integer number (610555115056).

Almost surely, 2^{1221110230111} is an apocalyptic number.

1221110230111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221110230111 is an equidigital number, since it uses as much as digits as its factorization.

1221110230111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1221110230111 its reverse (1110320111221), we get a palindrome (2331430341332).

The spelling of 1221110230111 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two hundred thirty thousand, one hundred eleven".