210131235504123 has 4 divisors (see below), whose sum is σ = 280174980672168. Its totient is φ = 140087490336080.

The previous prime is 210131235504101. The next prime is 210131235504137. The reversal of 210131235504123 is 321405532131012.

It is a happy number.

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 210131235504123 - 2¹³ = 210131235495931 is a prime.

It is a super-2 number, since 2×210131235504123² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210131235504173) 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, 35021872584018 + ... + 35021872584023.

It is an arithmetic number, because the mean of its divisors is an integer number (70043745168042).

Almost surely, 2^{210131235504123} is an apocalyptic number.

210131235504123 is a deficient number, since it is larger than the sum of its proper divisors (70043745168045).

210131235504123 is an equidigital number, since it uses as much as digits as its factorization.

210131235504123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70043745168044.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 210131235504123 its reverse (321405532131012), we get a palindrome (531536767635135).

The spelling of 210131235504123 in words is "two hundred ten trillion, one hundred thirty-one billion, two hundred thirty-five million, five hundred four thousand, one hundred twenty-three".