1012111221111 has 8 divisors (see below), whose sum is σ = 1428862900464. Its totient is φ = 635050177920.

The previous prime is 1012111221083. The next prime is 1012111221113. The reversal of 1012111221111 is 1111221112101.

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

It is not a de Polignac number, because 1012111221111 - 2⁶ = 1012111221047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012111221113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9922658980 + ... + 9922659081.

It is an arithmetic number, because the mean of its divisors is an integer number (178607862558).

Almost surely, 2^{1012111221111} is an apocalyptic number.

1012111221111 is a deficient number, since it is larger than the sum of its proper divisors (416751679353).

1012111221111 is a wasteful number, since it uses less digits than its factorization.

1012111221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19845318081.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1012111221111 its reverse (1111221112101), we get a palindrome (2123332333212).

The spelling of 1012111221111 in words is "one trillion, twelve billion, one hundred eleven million, two hundred twenty-one thousand, one hundred eleven".