201102121111 has 4 divisors (see below), whose sum is σ = 203934545424. Its totient is φ = 198269696800.

The previous prime is 201102121067. The next prime is 201102121127. The reversal of 201102121111 is 111121201102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201102121111 - 2¹³ = 201102112919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201102121091 and 201102121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201102121141) 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, 1416212050 + ... + 1416212191.

It is an arithmetic number, because the mean of its divisors is an integer number (50983636356).

Almost surely, 2^201102121111 is an apocalyptic number.

201102121111 is a deficient number, since it is larger than the sum of its proper divisors (2832424313).

201102121111 is an equidigital number, since it uses as much as digits as its factorization.

201102121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832424312.

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

Adding to 201102121111 its reverse (111121201102), we get a palindrome (312223322213).

The spelling of 201102121111 in words is "two hundred one billion, one hundred two million, one hundred twenty-one thousand, one hundred eleven".