20121234121 has 8 divisors (see below), whose sum is σ = 20171422080. Its totient is φ = 20071107888.

The previous prime is 20121234103. The next prime is 20121234127. The reversal of 20121234121 is 12143212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121234121 - 2¹¹ = 20121232073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121234127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675280 + ... + 704446.

It is an arithmetic number, because the mean of its divisors is an integer number (2521427760).

Almost surely, 2^20121234121 is an apocalyptic number.

It is an amenable number.

20121234121 is a deficient number, since it is larger than the sum of its proper divisors (50187959).

20121234121 is a wasteful number, since it uses less digits than its factorization.

20121234121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30863.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20121234121 its reverse (12143212102), we get a palindrome (32264446223).

The spelling of 20121234121 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-four thousand, one hundred twenty-one".