1220210110111 has 4 divisors (see below), whose sum is σ = 1225071505224. Its totient is φ = 1215348715000.

The previous prime is 1220210110103. The next prime is 1220210110127. The reversal of 1220210110111 is 1110110120221.

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 1220210110111 - 2³ = 1220210110103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220210110091 and 1220210110100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220210110181) 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, 2430697180 + ... + 2430697681.

It is an arithmetic number, because the mean of its divisors is an integer number (306267876306).

Almost surely, 2^{1220210110111} is an apocalyptic number.

1220210110111 is a deficient number, since it is larger than the sum of its proper divisors (4861395113).

1220210110111 is an equidigital number, since it uses as much as digits as its factorization.

1220210110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861395112.

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

Adding to 1220210110111 its reverse (1110110120221), we get a palindrome (2330320230332).

The spelling of 1220210110111 in words is "one trillion, two hundred twenty billion, two hundred ten million, one hundred ten thousand, one hundred eleven".