1222121020111 has 4 divisors (see below), whose sum is σ = 1222212984424. Its totient is φ = 1222029055800.

The previous prime is 1222121020061. The next prime is 1222121020187. The reversal of 1222121020111 is 1110201212221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222121020111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222121021111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45962220 + ... + 45988801.

It is an arithmetic number, because the mean of its divisors is an integer number (305553246106).

Almost surely, 2^{1222121020111} is an apocalyptic number.

1222121020111 is a deficient number, since it is larger than the sum of its proper divisors (91964313).

1222121020111 is an equidigital number, since it uses as much as digits as its factorization.

1222121020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91964312.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1222121020111 its reverse (1110201212221), we get a palindrome (2332322232332).

The spelling of 1222121020111 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty thousand, one hundred eleven".