1212110112211 has 4 divisors (see below), whose sum is σ = 1218201118000. Its totient is φ = 1206019106424.

The previous prime is 1212110112167. The next prime is 1212110112251. The reversal of 1212110112211 is 1122110112121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212110112211 - 2¹⁵ = 1212110079443 is a prime.

It is a super-2 number, since 2×1212110112211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212110112251) 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, 3045502596 + ... + 3045502993.

It is an arithmetic number, because the mean of its divisors is an integer number (304550279500).

Almost surely, 2^{1212110112211} is an apocalyptic number.

1212110112211 is a deficient number, since it is larger than the sum of its proper divisors (6091005789).

1212110112211 is an equidigital number, since it uses as much as digits as its factorization.

1212110112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6091005788.

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

Adding to 1212110112211 its reverse (1122110112121), we get a palindrome (2334220224332).

The spelling of 1212110112211 in words is "one trillion, two hundred twelve billion, one hundred ten million, one hundred twelve thousand, two hundred eleven".