20123133120031 has 4 divisors (see below), whose sum is σ = 21306846832992. Its totient is φ = 18939419407072.

The previous prime is 20123133120007. The next prime is 20123133120053. The reversal of 20123133120031 is 13002133132102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20123133120031 - 2⁹ = 20123133119519 is a prime.

It is a super-2 number, since 2×20123133120031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123133119984 and 20123133120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123133120071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591856856455 + ... + 591856856488.

It is an arithmetic number, because the mean of its divisors is an integer number (5326711708248).

Almost surely, 2^{20123133120031} is an apocalyptic number.

20123133120031 is a deficient number, since it is larger than the sum of its proper divisors (1183713712961).

20123133120031 is a wasteful number, since it uses less digits than its factorization.

20123133120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183713712960.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20123133120031 its reverse (13002133132102), we get a palindrome (33125266252133).

The spelling of 20123133120031 in words is "twenty trillion, one hundred twenty-three billion, one hundred thirty-three million, one hundred twenty thousand, thirty-one".