1212212201211 has 96 divisors (see below), whose sum is σ = 2098451846400. Its totient is φ = 691569290880.

The previous prime is 1212212201203. The next prime is 1212212201219. The reversal of 1212212201211 is 1121022122121.

1212212201211 is a `hidden beast` number, since 1 + 212 + 21 + 220 + 1 + 211 = 666.

It is an interprime number because it is at equal distance from previous prime (1212212201203) and next prime (1212212201219).

It is not a de Polignac number, because 1212212201211 - 2³ = 1212212201203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212212201219) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7897545 + ... + 8049573.

It is an arithmetic number, because the mean of its divisors is an integer number (21858873400).

Almost surely, 2^{1212212201211} is an apocalyptic number.

1212212201211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212212201211 is a deficient number, since it is larger than the sum of its proper divisors (886239645189).

1212212201211 is a wasteful number, since it uses less digits than its factorization.

1212212201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152231 (or 152219 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212212201211 its reverse (1121022122121), we get a palindrome (2333234323332).

The spelling of 1212212201211 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred one thousand, two hundred eleven".