1011221212011 has 8 divisors (see below), whose sum is σ = 1348309476864. Its totient is φ = 674140210920.

The previous prime is 1011221211989. The next prime is 1011221212021. The reversal of 1011221212011 is 1102121221101.

It is a happy number.

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

It is not a de Polignac number, because 1011221212011 - 2⁶ = 1011221211947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011221212021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1482351 + ... + 2054216.

It is an arithmetic number, because the mean of its divisors is an integer number (168538684608).

Almost surely, 2^{1011221212011} is an apocalyptic number.

1011221212011 is a deficient number, since it is larger than the sum of its proper divisors (337088264853).

1011221212011 is an equidigital number, since it uses as much as digits as its factorization.

1011221212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631881.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1011221212011 its reverse (1102121221101), we get a palindrome (2113342433112).

The spelling of 1011221212011 in words is "one trillion, eleven billion, two hundred twenty-one million, two hundred twelve thousand, eleven".