1211403142404 has 192 divisors, whose sum is σ = 3869736192000. Its totient is φ = 319136340096.

The previous prime is 1211403142403. The next prime is 1211403142457. The reversal of 1211403142404 is 4042413041121.

1211403142404 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 403 + 14 + 240 + 4 = 666.

It is a super-3 number, since 3×1211403142404³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1211403142403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8846047 + ... + 8981945.

It is an arithmetic number, because the mean of its divisors is an integer number (20154876000).

Almost surely, 2^{1211403142404} is an apocalyptic number.

1211403142404 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 1211403142404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934868096000).

1211403142404 is an abundant number, since it is smaller than the sum of its proper divisors (2658333049596).

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

1211403142404 is a wasteful number, since it uses less digits than its factorization.

1211403142404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136839 (or 136831 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 1211403142404 its reverse (4042413041121), we get a palindrome (5253816183525).

The spelling of 1211403142404 in words is "one trillion, two hundred eleven billion, four hundred three million, one hundred forty-two thousand, four hundred four".