1111100121222 has 256 divisors, whose sum is σ = 2906813952000. Its totient is φ = 281083944960.

The previous prime is 1111100121211. The next prime is 1111100121253. The reversal of 1111100121222 is 2221210011111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 70274854 + ... + 70290662.

It is an arithmetic number, because the mean of its divisors is an integer number (11354742000).

Almost surely, 2^{1111100121222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111100121222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1453406976000).

1111100121222 is an abundant number, since it is smaller than the sum of its proper divisors (1795713830778).

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

1111100121222 is a wasteful number, since it uses less digits than its factorization.

1111100121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15956 (or 15942 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111100121222 its reverse (2221210011111), we get a palindrome (3332310132333).

The spelling of 1111100121222 in words is "one trillion, one hundred eleven billion, one hundred million, one hundred twenty-one thousand, two hundred twenty-two".