1212120222211 has 16 divisors (see below), whose sum is σ = 1305788323840. Its totient is φ = 1121447527200.

The previous prime is 1212120222179. The next prime is 1212120222227. The reversal of 1212120222211 is 1122220212121.

It is a cyclic number.

It is not a de Polignac number, because 1212120222211 - 2⁵ = 1212120222179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212120220211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5390686 + ... + 5611036.

It is an arithmetic number, because the mean of its divisors is an integer number (81611770240).

Almost surely, 2^{1212120222211} is an apocalyptic number.

1212120222211 is a deficient number, since it is larger than the sum of its proper divisors (93668101629).

1212120222211 is a wasteful number, since it uses less digits than its factorization.

1212120222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227146.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212120222211 its reverse (1122220212121), we get a palindrome (2334340434332).

The spelling of 1212120222211 in words is "one trillion, two hundred twelve billion, one hundred twenty million, two hundred twenty-two thousand, two hundred eleven".