212102220022111 has 4 divisors (see below), whose sum is σ = 212333016780400. Its totient is φ = 211871423263824.

The previous prime is 212102220022061. The next prime is 212102220022123. The reversal of 212102220022111 is 111220022201212.

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 212102220022111 - 2¹³ = 212102220013919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102220022211) 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, 115398377766 + ... + 115398379603.

It is an arithmetic number, because the mean of its divisors is an integer number (53083254195100).

Almost surely, 2^{212102220022111} is an apocalyptic number.

212102220022111 is a deficient number, since it is larger than the sum of its proper divisors (230796758289).

212102220022111 is an equidigital number, since it uses as much as digits as its factorization.

212102220022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230796758288.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212102220022111 its reverse (111220022201212), we get a palindrome (323322242223323).

The spelling of 212102220022111 in words is "two hundred twelve trillion, one hundred two billion, two hundred twenty million, twenty-two thousand, one hundred eleven".