10211222121111 has 40 divisors (see below), whose sum is σ = 16693675148304. Its totient is φ = 6168847351680.

The previous prime is 10211222121109. The next prime is 10211222121127. The reversal of 10211222121111 is 11112122211201.

It is a happy number.

10211222121111 is a `hidden beast` number, since 1 + 0 + 211 + 222 + 121 + 111 = 666.

It is not a de Polignac number, because 10211222121111 - 2¹ = 10211222121109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211222121181) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18028476 + ... + 18586241.

Almost surely, 2^{10211222121111} is an apocalyptic number.

10211222121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10211222121111 is a deficient number, since it is larger than the sum of its proper divisors (6482453027193).

10211222121111 is a wasteful number, since it uses less digits than its factorization.

10211222121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36615053 (or 36615044 counting only the distinct ones).

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

Adding to 10211222121111 its reverse (11112122211201), we get a palindrome (21323344332312).

The spelling of 10211222121111 in words is "ten trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".