102010121111 has 4 divisors (see below), whose sum is σ = 106445343792. Its totient is φ = 97574898432.

The previous prime is 102010121093. The next prime is 102010121113. The reversal of 102010121111 is 111121010201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102010121111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102010121092 and 102010121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102010121113) 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, 2217611306 + ... + 2217611351.

It is an arithmetic number, because the mean of its divisors is an integer number (26611335948).

Almost surely, 2^102010121111 is an apocalyptic number.

102010121111 is a deficient number, since it is larger than the sum of its proper divisors (4435222681).

102010121111 is an equidigital number, since it uses as much as digits as its factorization.

102010121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4435222680.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 102010121111 its reverse (111121010201), we get a palindrome (213131131312).

The spelling of 102010121111 in words is "one hundred two billion, ten million, one hundred twenty-one thousand, one hundred eleven".