102120011011111 has 16 divisors (see below), whose sum is σ = 105668106907968. Its totient is φ = 98636132358400.

The previous prime is 102120011011093. The next prime is 102120011011147. The reversal of 102120011011111 is 111110110021201.

It is a cyclic number.

It is not a de Polignac number, because 102120011011111 - 2³³ = 102111421076519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120011011091 and 102120011011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120011011511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17495230 + ... + 22590331.

It is an arithmetic number, because the mean of its divisors is an integer number (6604256681748).

Almost surely, 2^{102120011011111} is an apocalyptic number.

102120011011111 is a deficient number, since it is larger than the sum of its proper divisors (3548095896857).

102120011011111 is an equidigital number, since it uses as much as digits as its factorization.

102120011011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40086362.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 102120011011111 its reverse (111110110021201), we get a palindrome (213230121032312).

The spelling of 102120011011111 in words is "one hundred two trillion, one hundred twenty billion, eleven million, eleven thousand, one hundred eleven".