10001111101220 has 24 divisors (see below), whose sum is σ = 21002451228864. Its totient is φ = 4000421980256.

The previous prime is 10001111101213. The next prime is 10001111101271. The reversal of 10001111101220 is 2210111110001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2514257 + ... + 5130663.

It is an arithmetic number, because the mean of its divisors is an integer number (875102134536).

Almost surely, 2^{10001111101220} is an apocalyptic number.

10001111101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001111101220 is an abundant number, since it is smaller than the sum of its proper divisors (11001340127644).

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

10001111101220 is a wasteful number, since it uses less digits than its factorization.

10001111101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807539 (or 2807537 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 10001111101220 its reverse (2210111110001), we get a palindrome (12211222211221).

The spelling of 10001111101220 in words is "ten trillion, one billion, one hundred eleven million, one hundred one thousand, two hundred twenty".