210120131123 has 8 divisors (see below), whose sum is σ = 240157681248. Its totient is φ = 180087678144.

The previous prime is 210120131113. The next prime is 210120131129. The reversal of 210120131123 is 321131021012.

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

It is a cyclic number.

It is not a de Polignac number, because 210120131123 - 2²⁸ = 209851695667 is a prime.

It is a super-2 number, since 2×210120131123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210120131129) 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, 1185536 + ... + 1351197.

It is an arithmetic number, because the mean of its divisors is an integer number (30019710156).

Almost surely, 2^210120131123 is an apocalyptic number.

210120131123 is a deficient number, since it is larger than the sum of its proper divisors (30037550125).

210120131123 is a wasteful number, since it uses less digits than its factorization.

210120131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548573.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 210120131123 its reverse (321131021012), we get a palindrome (531251152135).

The spelling of 210120131123 in words is "two hundred ten billion, one hundred twenty million, one hundred thirty-one thousand, one hundred twenty-three".