1211002212211 has 4 divisors (see below), whose sum is σ = 1321093322424. Its totient is φ = 1100911102000.

The previous prime is 1211002212169. The next prime is 1211002212223. The reversal of 1211002212211 is 1122122001121.

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 1211002212211 - 2⁷ = 1211002212083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211002219211) 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, 55045555090 + ... + 55045555111.

It is an arithmetic number, because the mean of its divisors is an integer number (330273330606).

Almost surely, 2^{1211002212211} is an apocalyptic number.

1211002212211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211002212211 is a deficient number, since it is larger than the sum of its proper divisors (110091110213).

1211002212211 is a wasteful number, since it uses less digits than its factorization.

1211002212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110091110212.

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

Adding to 1211002212211 its reverse (1122122001121), we get a palindrome (2333124213332).

The spelling of 1211002212211 in words is "one trillion, two hundred eleven billion, two million, two hundred twelve thousand, two hundred eleven".