20123210131 has 8 divisors (see below), whose sum is σ = 21309153840. Its totient is φ = 18937513728.

The previous prime is 20123210119. The next prime is 20123210143. The reversal of 20123210131 is 13101232102.

It is an interprime number because it is at equal distance from previous prime (20123210119) and next prime (20123210143).

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-20123210131 is a prime.

It is a super-2 number, since 2×20123210131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123210101) 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, 121215 + ... + 234391.

It is an arithmetic number, because the mean of its divisors is an integer number (2663644230).

Almost surely, 2^20123210131 is an apocalyptic number.

20123210131 is a deficient number, since it is larger than the sum of its proper divisors (1185943709).

20123210131 is a wasteful number, since it uses less digits than its factorization.

20123210131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123653.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20123210131 its reverse (13101232102), we get a palindrome (33224442233).

The spelling of 20123210131 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, one hundred thirty-one".