20121230101 has 12 divisors (see below), whose sum is σ = 23414540940. Its totient is φ = 17240717760.

The previous prime is 20121230083. The next prime is 20121230111. The reversal of 20121230101 is 10103212102.

It can be written as a sum of positive squares in 2 ways, for example, as 7073651025 + 13047579076 = 84105^2 + 114226^2 .

It is not a de Polignac number, because 20121230101 - 2⁹ = 20121229589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121230111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71961 + ... + 213121.

It is an arithmetic number, because the mean of its divisors is an integer number (1951211745).

Almost surely, 2^20121230101 is an apocalyptic number.

It is an amenable number.

20121230101 is a deficient number, since it is larger than the sum of its proper divisors (3293310839).

20121230101 is a wasteful number, since it uses less digits than its factorization.

20121230101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144084 (or 144077 counting only the distinct ones).

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

Adding to 20121230101 its reverse (10103212102), we get a palindrome (30224442203).

The spelling of 20121230101 in words is "twenty billion, one hundred twenty-one million, two hundred thirty thousand, one hundred one".