2111110101220 has 96 divisors (see below), whose sum is σ = 4502867846400. Its totient is φ = 831307276800.

The previous prime is 2111110101187. The next prime is 2111110101223. The reversal of 2111110101220 is 221010111112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111110101220.

It is not an unprimeable number, because it can be changed into a prime (2111110101223) 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, 901797250 + ... + 901799590.

It is an arithmetic number, because the mean of its divisors is an integer number (46904873400).

Almost surely, 2^{2111110101220} is an apocalyptic number.

2111110101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111110101220 is an abundant number, since it is smaller than the sum of its proper divisors (2391757745180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2111110101220 is a wasteful number, since it uses less digits than its factorization.

2111110101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949 (or 4947 counting only the distinct ones).

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

Adding to 2111110101220 its reverse (221010111112), we get a palindrome (2332120212332).

The spelling of 2111110101220 in words is "two trillion, one hundred eleven billion, one hundred ten million, one hundred one thousand, two hundred twenty".