210123131000 has 128 divisors (see below), whose sum is σ = 500668646400. Its totient is φ = 82517852800.

The previous prime is 210123130999. The next prime is 210123131011. The reversal of 210123131000 is 131321012.

It is a super-2 number, since 2×210123131000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57995189 + ... + 57998811.

It is an arithmetic number, because the mean of its divisors is an integer number (3911473800).

Almost surely, 2^210123131000 is an apocalyptic number.

210123131000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210123131000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250334323200).

210123131000 is an abundant number, since it is smaller than the sum of its proper divisors (290545515400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210123131000 is a wasteful number, since it uses less digits than its factorization.

210123131000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686 (or 4672 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 210123131000 its reverse (131321012), we get a palindrome (210254452012).

The spelling of 210123131000 in words is "two hundred ten billion, one hundred twenty-three million, one hundred thirty-one thousand".