20101011222111 has 16 divisors (see below), whose sum is σ = 27968193921024. Its totient is φ = 12817316736224.

The previous prime is 20101011222091. The next prime is 20101011222143. The reversal of 20101011222111 is 11122211010102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20101011222111 - 2⁵ = 20101011222079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101011222181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6935391 + ... + 9396896.

It is an arithmetic number, because the mean of its divisors is an integer number (1748012120064).

Almost surely, 2^{20101011222111} is an apocalyptic number.

20101011222111 is a deficient number, since it is larger than the sum of its proper divisors (7867182698913).

20101011222111 is a wasteful number, since it uses less digits than its factorization.

20101011222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16350150.

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

Adding to 20101011222111 its reverse (11122211010102), we get a palindrome (31223222232213).

The spelling of 20101011222111 in words is "twenty trillion, one hundred one billion, eleven million, two hundred twenty-two thousand, one hundred eleven".