11111222101000 has 128 divisors (see below), whose sum is σ = 29718229282560. Its totient is φ = 3809094336000.

The previous prime is 11111222100991. The next prime is 11111222101013. The reversal of 11111222101000 is 10122211111.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59553859 + ... + 59740141.

It is an arithmetic number, because the mean of its divisors is an integer number (232173666270).

Almost surely, 2^{11111222101000} is an apocalyptic number.

11111222101000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111222101000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14859114641280).

11111222101000 is an abundant number, since it is smaller than the sum of its proper divisors (18607007181560).

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

11111222101000 is a wasteful number, since it uses less digits than its factorization.

11111222101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194832 (or 194818 counting only the distinct ones).

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

Adding to 11111222101000 its reverse (10122211111), we get a palindrome (11121344312111).

The spelling of 11111222101000 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-two million, one hundred one thousand".