20121234342 has 32 divisors (see below), whose sum is σ = 44335551744. Its totient is φ = 6036972000.

The previous prime is 20121234337. The next prime is 20121234431. The reversal of 20121234342 is 24343212102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1502578 + ... + 1515909.

It is an arithmetic number, because the mean of its divisors is an integer number (1385485992).

Almost surely, 2^20121234342 is an apocalyptic number.

20121234342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121234342 is an abundant number, since it is smaller than the sum of its proper divisors (24214317402).

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

20121234342 is a wasteful number, since it uses less digits than its factorization.

20121234342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018604.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20121234342 its reverse (24343212102), we get a palindrome (44464446444).

The spelling of 20121234342 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-four thousand, three hundred forty-two".