1222212110000 has 400 divisors, whose sum is σ = 3616565578560. Its totient is φ = 390451200000.

The previous prime is 1222212109999. The next prime is 1222212110023. The reversal of 1222212110000 is 112122221.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 120184916 + ... + 120195084.

Almost surely, 2^{1222212110000} is an apocalyptic number.

1222212110000 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 1222212110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808282789280).

1222212110000 is an abundant number, since it is smaller than the sum of its proper divisors (2394353468560).

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

1222212110000 is a wasteful number, since it uses less digits than its factorization.

1222212110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10322 (or 10301 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1222212110000 its reverse (112122221), we get a palindrome (1222324232221).

The spelling of 1222212110000 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred ten thousand".