11111101210220 has 48 divisors (see below), whose sum is σ = 25455261436416. Its totient is φ = 4040283192000.

The previous prime is 11111101210201. The next prime is 11111101210243. The reversal of 11111101210220 is 2201210111111.

It is a junction number, because it is equal to n+sod(n) for n = 11111101210195 and 11111101210204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7053275 + ... + 8483565.

It is an arithmetic number, because the mean of its divisors is an integer number (530317946592).

Almost surely, 2^{11111101210220} is an apocalyptic number.

11111101210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111101210220 is an abundant number, since it is smaller than the sum of its proper divisors (14344160226196).

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

11111101210220 is a wasteful number, since it uses less digits than its factorization.

11111101210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465622 (or 1465620 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11111101210220 its reverse (2201210111111), we get a palindrome (13312311321331).

The spelling of 11111101210220 in words is "eleven trillion, one hundred eleven billion, one hundred one million, two hundred ten thousand, two hundred twenty".