20121023230 has 32 divisors (see below), whose sum is σ = 45154713600. Its totient is φ = 6271487520.

The previous prime is 20121023173. The next prime is 20121023233. The reversal of 20121023230 is 3232012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121023233) 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, 13064830 + ... + 13066369.

It is an arithmetic number, because the mean of its divisors is an integer number (1411084800).

Almost surely, 2^20121023230 is an apocalyptic number.

20121023230 is an abundant number, since it is smaller than the sum of its proper divisors (25033690370).

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

20121023230 is a wasteful number, since it uses less digits than its factorization.

20121023230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26131224.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20121023230 its reverse (3232012102), we get a palindrome (23353035332).

The spelling of 20121023230 in words is "twenty billion, one hundred twenty-one million, twenty-three thousand, two hundred thirty".