1222111110000 has 800 divisors, whose sum is σ = 4468372862976. Its totient is φ = 285120000000.

The previous prime is 1222111109971. The next prime is 1222111110029. The reversal of 1222111110000 is 111112221.

It is an interprime number because it is at equal distance from previous prime (1222111109971) and next prime (1222111110029).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1233209505 + ... + 1233210495.

Almost surely, 2^{1222111110000} is an apocalyptic number.

1222111110000 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 1222111110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234186431488).

1222111110000 is an abundant number, since it is smaller than the sum of its proper divisors (3246261752976).

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

1222111110000 is a wasteful number, since it uses less digits than its factorization.

1222111110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1222111110000 its reverse (111112221), we get a palindrome (1222222222221).

The spelling of 1222111110000 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, one hundred ten thousand".