220212112121111 has 48 divisors (see below), whose sum is σ = 269228440846080. Its totient is φ = 177985679304960.

The previous prime is 220212112121081. The next prime is 220212112121117. The reversal of 220212112121111 is 111121211212022.

It is a happy number.

It is not a de Polignac number, because 220212112121111 - 2³⁸ = 219937234214167 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 (220212112121117) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18724550 + ... + 28125308.

It is an arithmetic number, because the mean of its divisors is an integer number (5608925850960).

Almost surely, 2^{220212112121111} is an apocalyptic number.

220212112121111 is a deficient number, since it is larger than the sum of its proper divisors (49016328724969).

220212112121111 is a wasteful number, since it uses less digits than its factorization.

220212112121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9401172 (or 9401153 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 220212112121111 its reverse (111121211212022), we get a palindrome (331333323333133).

The spelling of 220212112121111 in words is "two hundred twenty trillion, two hundred twelve billion, one hundred twelve million, one hundred twenty-one thousand, one hundred eleven".