102011211111 has 4 divisors (see below), whose sum is σ = 136014948152. Its totient is φ = 68007474072.

The previous prime is 102011211067. The next prime is 102011211167. The reversal of 102011211111 is 111112110201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111112110201 = 3 ⋅37037370067.

It is not a de Polignac number, because 102011211111 - 2⁶ = 102011211047 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 (102011211811) 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, 17001868516 + ... + 17001868521.

It is an arithmetic number, because the mean of its divisors is an integer number (34003737038).

Almost surely, 2^102011211111 is an apocalyptic number.

102011211111 is a deficient number, since it is larger than the sum of its proper divisors (34003737041).

102011211111 is an equidigital number, since it uses as much as digits as its factorization.

102011211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34003737040.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 102011211111 its reverse (111112110201), we get a palindrome (213123321312).

The spelling of 102011211111 in words is "one hundred two billion, eleven million, two hundred eleven thousand, one hundred eleven".