102121201111 has 32 divisors (see below), whose sum is σ = 107919092736. Its totient is φ = 96548112000.

The previous prime is 102121201103. The next prime is 102121201151. The reversal of 102121201111 is 111102121201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102121201111 - 2³ = 102121201103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121201091 and 102121201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121201151) 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, 43069756 + ... + 43072126.

It is an arithmetic number, because the mean of its divisors is an integer number (3372471648).

Almost surely, 2^102121201111 is an apocalyptic number.

102121201111 is a deficient number, since it is larger than the sum of its proper divisors (5797891625).

102121201111 is a wasteful number, since it uses less digits than its factorization.

102121201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 102121201111 its reverse (111102121201), we get a palindrome (213223322312).

It can be divided in two parts, 102121201 and 111, that multiplied together give a palindrome (11335453311).

The spelling of 102121201111 in words is "one hundred two billion, one hundred twenty-one million, two hundred one thousand, one hundred eleven".