12140621251242 has 64 divisors (see below), whose sum is σ = 26860465607040. Its totient is φ = 3627365760000.

The previous prime is 12140621251211. The next prime is 12140621251331. The reversal of 12140621251242 is 24215212604121.

It is a super-2 number, since 2×12140621251242² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 14038984 + ... + 14878652.

It is an arithmetic number, because the mean of its divisors is an integer number (419694775110).

Almost surely, 2^{12140621251242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12140621251242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13430232803520).

12140621251242 is an abundant number, since it is smaller than the sum of its proper divisors (14719844355798).

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

12140621251242 is a wasteful number, since it uses less digits than its factorization.

12140621251242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842759.

The product of its (nonzero) digits is 15360, while the sum is 33.

Adding to 12140621251242 its reverse (24215212604121), we get a palindrome (36355833855363).

The spelling of 12140621251242 in words is "twelve trillion, one hundred forty billion, six hundred twenty-one million, two hundred fifty-one thousand, two hundred forty-two".