1210220120111 has 2 divisors, whose sum is σ = 1210220120112. Its totient is φ = 1210220120110.

The previous prime is 1210220120107. The next prime is 1210220120147. The reversal of 1210220120111 is 1110210220121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210220120111 - 2² = 1210220120107 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210220120101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605110060055 + 605110060056.

It is an arithmetic number, because the mean of its divisors is an integer number (605110060056).

Almost surely, 2^{1210220120111} is an apocalyptic number.

1210220120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210220120111 is an equidigital number, since it uses as much as digits as its factorization.

1210220120111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1210220120111 its reverse (1110210220121), we get a palindrome (2320430340232).

It can be divided in two parts, 1210220 and 120111, that added together give a palindrome (1330331).

The spelling of 1210220120111 in words is "one trillion, two hundred ten billion, two hundred twenty million, one hundred twenty thousand, one hundred eleven".