12103402140 has 72 divisors (see below), whose sum is σ = 36850282560. Its totient is φ = 3215562624.

The previous prime is 12103402121. The next prime is 12103402147. The reversal of 12103402140 is 4120430121.

12103402140 is a `hidden beast` number, since 121 + 0 + 3 + 402 + 140 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103402147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76564 + ... + 173403.

It is an arithmetic number, because the mean of its divisors is an integer number (511809480).

Almost surely, 2^12103402140 is an apocalyptic number.

12103402140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12103402140 is an abundant number, since it is smaller than the sum of its proper divisors (24746880420).

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

12103402140 is a wasteful number, since it uses less digits than its factorization.

12103402140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250251 (or 250246 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12103402140 its reverse (4120430121), we get a palindrome (16223832261).

The spelling of 12103402140 in words is "twelve billion, one hundred three million, four hundred two thousand, one hundred forty".