10212122211111 has 24 divisors (see below), whose sum is σ = 15209871387984. Its totient is φ = 6597688464000.

The previous prime is 10212122211103. The next prime is 10212122211149. The reversal of 10212122211111 is 11111222121201.

It is a happy number.

10212122211111 is a `hidden beast` number, since 10 + 212 + 122 + 211 + 111 = 666.

It is not a de Polignac number, because 10212122211111 - 2³ = 10212122211103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212122211191) 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 23 ways as a sum of consecutive naturals, for example, 61006126 + ... + 61173291.

It is an arithmetic number, because the mean of its divisors is an integer number (633744641166).

Almost surely, 2^{10212122211111} is an apocalyptic number.

10212122211111 is a deficient number, since it is larger than the sum of its proper divisors (4997749176873).

10212122211111 is a wasteful number, since it uses less digits than its factorization.

10212122211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122179711 (or 122179708 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 10212122211111 its reverse (11111222121201), we get a palindrome (21323344332312).

It can be divided in two parts, 1021212 and 2211111, that added together give a palindrome (3232323).

The spelling of 10212122211111 in words is "ten trillion, two hundred twelve billion, one hundred twenty-two million, two hundred eleven thousand, one hundred eleven".