20134023121 has 2 divisors, whose sum is σ = 20134023122. Its totient is φ = 20134023120.

The previous prime is 20134023109. The next prime is 20134023139. The reversal of 20134023121 is 12132043102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19513016721 + 621006400 = 139689^2 + 24920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20134023121 is a prime.

It is not a weakly prime, because it can be changed into another prime (20134023101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067011560 + 10067011561.

It is an arithmetic number, because the mean of its divisors is an integer number (10067011561).

Almost surely, 2^20134023121 is an apocalyptic number.

It is an amenable number.

20134023121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20134023121 is an equidigital number, since it uses as much as digits as its factorization.

20134023121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20134023121 its reverse (12132043102), we get a palindrome (32266066223).

The spelling of 20134023121 in words is "twenty billion, one hundred thirty-four million, twenty-three thousand, one hundred twenty-one".