210020103031123 has 64 divisors (see below), whose sum is σ = 277684891545600. Its totient is φ = 153883533767040.

The previous prime is 210020103031111. The next prime is 210020103031129. The reversal of 210020103031123 is 321130301020012.

It is not a de Polignac number, because 210020103031123 - 2¹³ = 210020103022931 is a prime.

It is a super-2 number, since 2×210020103031123² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 210020103031123.

It is not an unprimeable number, because it can be changed into a prime (210020103031129) 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 63 ways as a sum of consecutive naturals, for example, 119890836 + ... + 121629982.

It is an arithmetic number, because the mean of its divisors is an integer number (4338826430400).

Almost surely, 2^{210020103031123} is an apocalyptic number.

210020103031123 is a deficient number, since it is larger than the sum of its proper divisors (67664788514477).

210020103031123 is a wasteful number, since it uses less digits than its factorization.

210020103031123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739800.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 210020103031123 its reverse (321130301020012), we get a palindrome (531150404051135).

The spelling of 210020103031123 in words is "two hundred ten trillion, twenty billion, one hundred three million, thirty-one thousand, one hundred twenty-three".