12142140402 has 64 divisors (see below), whose sum is σ = 28606169088. Its totient is φ = 3364200000.

The previous prime is 12142140391. The next prime is 12142140403. The reversal of 12142140402 is 20404124121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12142140403) 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, 148527 + ... + 215277.

It is an arithmetic number, because the mean of its divisors is an integer number (446971392).

Almost surely, 2^12142140402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12142140402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14303084544).

12142140402 is an abundant number, since it is smaller than the sum of its proper divisors (16464028686).

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

12142140402 is a wasteful number, since it uses less digits than its factorization.

12142140402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66895.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12142140402 its reverse (20404124121), we get a palindrome (32546264523).

The spelling of 12142140402 in words is "twelve billion, one hundred forty-two million, one hundred forty thousand, four hundred two".