1212122210111 has 8 divisors (see below), whose sum is σ = 1266167325024. Its totient is φ = 1158189107680.

The previous prime is 1212122210071. The next prime is 1212122210119. The reversal of 1212122210111 is 1110122212121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212122210111 - 2²² = 1212118015807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212122210111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212122210119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27980996 + ... + 28024281.

It is an arithmetic number, because the mean of its divisors is an integer number (158270915628).

Almost surely, 2^{1212122210111} is an apocalyptic number.

1212122210111 is a deficient number, since it is larger than the sum of its proper divisors (54045114913).

1212122210111 is an equidigital number, since it uses as much as digits as its factorization.

1212122210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56006241.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1212122210111 its reverse (1110122212121), we get a palindrome (2322244422232).

The spelling of 1212122210111 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred ten thousand, one hundred eleven".