12123012001 has 16 divisors (see below), whose sum is σ = 13205399760. Its totient is φ = 11082700800.

The previous prime is 12123011941. The next prime is 12123012007. The reversal of 12123012001 is 10021032121.

It can be written as a sum of positive squares in 8 ways, for example, as 5529409600 + 6593602401 = 74360^2 + 81201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123012001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12123012007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361995 + ... + 394063.

It is an arithmetic number, because the mean of its divisors is an integer number (825337485).

Almost surely, 2^12123012001 is an apocalyptic number.

It is an amenable number.

12123012001 is a deficient number, since it is larger than the sum of its proper divisors (1082387759).

12123012001 is a wasteful number, since it uses less digits than its factorization.

12123012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32724.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12123012001 its reverse (10021032121), we get a palindrome (22144044122).

The spelling of 12123012001 in words is "twelve billion, one hundred twenty-three million, twelve thousand, one".