20020123133231 has 8 divisors (see below), whose sum is σ = 21715241474640. Its totient is φ = 18347163201792.

The previous prime is 20020123133209. The next prime is 20020123133239. The reversal of 20020123133231 is 13233132102002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020123133231 is a prime.

It is a super-2 number, since 2×20020123133231² (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 = 20020123133197 and 20020123133206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020123133239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5539600610 + ... + 5539604223.

It is an arithmetic number, because the mean of its divisors is an integer number (2714405184330).

Almost surely, 2^{20020123133231} is an apocalyptic number.

20020123133231 is a deficient number, since it is larger than the sum of its proper divisors (1695118341409).

20020123133231 is a wasteful number, since it uses less digits than its factorization.

20020123133231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11079204985.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20020123133231 its reverse (13233132102002), we get a palindrome (33253255235233).

The spelling of 20020123133231 in words is "twenty trillion, twenty billion, one hundred twenty-three million, one hundred thirty-three thousand, two hundred thirty-one".