1212200112000 has 256 divisors, whose sum is σ = 4047797033280. Its totient is φ = 320892108800.

The previous prime is 1212200111981. The next prime is 1212200112023. The reversal of 1212200112000 is 2110022121.

It is a super-2 number, since 2×1212200112000² (a number of 25 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 6483832 + ... + 6668168.

Almost surely, 2^{1212200112000} is an apocalyptic number.

1212200112000 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 1212200112000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2023898516640).

1212200112000 is an abundant number, since it is smaller than the sum of its proper divisors (2835596921280).

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

1212200112000 is a wasteful number, since it uses less digits than its factorization.

1212200112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184506 (or 184484 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1212200112000 its reverse (2110022121), we get a palindrome (1214310134121).

The spelling of 1212200112000 in words is "one trillion, two hundred twelve billion, two hundred million, one hundred twelve thousand".