12156101602 has 4 divisors (see below), whose sum is σ = 18234152406. Its totient is φ = 6078050800.

The previous prime is 12156101569. The next prime is 12156101609. The reversal of 12156101602 is 20610165121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12150432441 + 5669161 = 110229^2 + 2381^2 .

It is not an unprimeable number, because it can be changed into a prime (12156101609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3039025399 + ... + 3039025402.

Almost surely, 2^12156101602 is an apocalyptic number.

12156101602 is a deficient number, since it is larger than the sum of its proper divisors (6078050804).

12156101602 is an equidigital number, since it uses as much as digits as its factorization.

12156101602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078050803.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 12156101602 its reverse (20610165121), we get a palindrome (32766266723).

The spelling of 12156101602 in words is "twelve billion, one hundred fifty-six million, one hundred one thousand, six hundred two".