102212121111 has 32 divisors (see below), whose sum is σ = 140577094080. Its totient is φ = 66027945984.

The previous prime is 102212121101. The next prime is 102212121113. The reversal of 102212121111 is 111121212201.

It is a happy number.

It is not a de Polignac number, because 102212121111 - 2¹¹ = 102212119063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102212121113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13821831 + ... + 13829223.

It is an arithmetic number, because the mean of its divisors is an integer number (4393034190).

Almost surely, 2^102212121111 is an apocalyptic number.

102212121111 is a deficient number, since it is larger than the sum of its proper divisors (38364972969).

102212121111 is an equidigital number, since it uses as much as digits as its factorization.

102212121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515.

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

Adding to 102212121111 its reverse (111121212201), we get a palindrome (213333333312).

The spelling of 102212121111 in words is "one hundred two billion, two hundred twelve million, one hundred twenty-one thousand, one hundred eleven".