1011212120111 has 4 divisors (see below), whose sum is σ = 1011214321392. Its totient is φ = 1011209918832.

The previous prime is 1011212120071. The next prime is 1011212120159. The reversal of 1011212120111 is 1110212121101.

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 1011212120111 - 2²² = 1011207925807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011212120411) 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, 120830 + ... + 1427243.

It is an arithmetic number, because the mean of its divisors is an integer number (252803580348).

Almost surely, 2^{1011212120111} is an apocalyptic number.

1011212120111 is a deficient number, since it is larger than the sum of its proper divisors (2201281).

1011212120111 is an equidigital number, since it uses as much as digits as its factorization.

1011212120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201280.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1011212120111 its reverse (1110212121101), we get a palindrome (2121424241212).

The spelling of 1011212120111 in words is "one trillion, eleven billion, two hundred twelve million, one hundred twenty thousand, one hundred eleven".