1212202404 has 144 divisors (see below), whose sum is σ = 3580327296. Its totient is φ = 338688000.

The previous prime is 1212202403. The next prime is 1212202417. The reversal of 1212202404 is 4042022121.

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

It is not an unprimeable number, because it can be changed into a prime (1212202403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2468599 + ... + 2469089.

It is an arithmetic number, because the mean of its divisors is an integer number (24863384).

Almost surely, 2^1212202404 is an apocalyptic number.

1212202404 is a gapful number since it is divisible by the number (14) 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 1212202404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1790163648).

1212202404 is an abundant number, since it is smaller than the sum of its proper divisors (2368124892).

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

1212202404 is a wasteful number, since it uses less digits than its factorization.

1212202404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1212202404 is about 34816.6972011993. The cubic root of 1212202404 is about 1066.2483701432.

Adding to 1212202404 its reverse (4042022121), we get a palindrome (5254224525).

The spelling of 1212202404 in words is "one billion, two hundred twelve million, two hundred two thousand, four hundred four".