1212000222312 has 192 divisors, whose sum is σ = 3669873480000. Its totient is φ = 358156262400.

The previous prime is 1212000222263. The next prime is 1212000222337. The reversal of 1212000222312 is 2132220002121.

1212000222312 is a `hidden beast` number, since 12 + 120 + 0 + 0 + 222 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87635014 + ... + 87648842.

It is an arithmetic number, because the mean of its divisors is an integer number (19113924375).

Almost surely, 2^{1212000222312} is an apocalyptic number.

1212000222312 is a gapful number since it is divisible by the number (12) 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 1212000222312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1834936740000).

1212000222312 is an abundant number, since it is smaller than the sum of its proper divisors (2457873257688).

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

1212000222312 is a wasteful number, since it uses less digits than its factorization.

1212000222312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16592 (or 16585 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1212000222312 its reverse (2132220002121), we get a palindrome (3344220224433).

The spelling of 1212000222312 in words is "one trillion, two hundred twelve billion, two hundred twenty-two thousand, three hundred twelve".