1212004402000 has 160 divisors (see below), whose sum is σ = 3374859780864. Its totient is φ = 412371648000.

The previous prime is 1212004401917. The next prime is 1212004402001. The reversal of 1212004402000 is 2044002121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212004402001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1503574 + ... + 2164426.

Almost surely, 2^{1212004402000} is an apocalyptic number.

1212004402000 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 1212004402000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687429890432).

1212004402000 is an abundant number, since it is smaller than the sum of its proper divisors (2162855378864).

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

1212004402000 is a wasteful number, since it uses less digits than its factorization.

1212004402000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661014 (or 660998 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1212004402000 its reverse (2044002121), we get a palindrome (1214048404121).

The spelling of 1212004402000 in words is "one trillion, two hundred twelve billion, four million, four hundred two thousand".