1211222012011 has 8 divisors (see below), whose sum is σ = 1321416874800. Its totient is φ = 1101041111040.

The previous prime is 1211222012009. The next prime is 1211222012023. The reversal of 1211222012011 is 1102102221121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211222012011 - 2¹ = 1211222012009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211222012071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3308646 + ... + 3656443.

It is an arithmetic number, because the mean of its divisors is an integer number (165177109350).

Almost surely, 2^{1211222012011} is an apocalyptic number.

1211222012011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211222012011 is a deficient number, since it is larger than the sum of its proper divisors (110194862789).

1211222012011 is a wasteful number, since it uses less digits than its factorization.

1211222012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6980909.

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

Adding to 1211222012011 its reverse (1102102221121), we get a palindrome (2313324233132).

The spelling of 1211222012011 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, twelve thousand, eleven".