102120111111 has 8 divisors (see below), whose sum is σ = 139840152304. Its totient is φ = 66240072000.

The previous prime is 102120111011. The next prime is 102120111151. The reversal of 102120111111 is 111111021201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102120111111 - 2³⁴ = 84940241927 is a prime.

It is a Duffinian number.

102120111111 is a modest number, since divided by 111111 gives 102120 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120111151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460000390 + ... + 460000611.

It is an arithmetic number, because the mean of its divisors is an integer number (17480019038).

Almost surely, 2^102120111111 is an apocalyptic number.

102120111111 is a deficient number, since it is larger than the sum of its proper divisors (37720041193).

102120111111 is an equidigital number, since it uses as much as digits as its factorization.

102120111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920001041.

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

Adding to 102120111111 its reverse (111111021201), we get a palindrome (213231132312).

It can be divided in two parts, 1021201 and 11111, that multiplied together give a palindrome (11346564311).

The spelling of 102120111111 in words is "one hundred two billion, one hundred twenty million, one hundred eleven thousand, one hundred eleven".